JP2020509620A - Method for transmitting uplink control information of a terminal in a wireless communication system and apparatus supporting the same - Google Patents

Abstract

The present invention relates to a method for transmitting uplink control information by a terminal in a wireless communication system and an apparatus supporting the method. More specifically, according to the present invention, when a terminal transmits uplink control information via a physical uplink shared channel, the terminal maps the uplink control information to the physical uplink shared channel and an uplink based on the method. A transmission operation of control information is disclosed. [Selection diagram] FIG.

Description

  The following description relates to a wireless communication system, and more particularly, to a method in which a terminal transmits uplink control information to a base station and a device for supporting the method in a wireless communication system to which various pharmacologies can be applied.

  More specifically, when a terminal transmits uplink control information via a physical uplink control channel (Physical Uplink Shared Channel), a method of mapping the uplink control information and an uplink of the terminal based on the method are described below. Includes a description of the control information transmission method.

  Wireless access systems are widely deployed to provide various communication services such as voice and data. Generally, a wireless access system is a multiple access system that can support communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of the multiple access system include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access multiple access (TDMA) system, and a multiple activation multiple access multiple access system (OFDMA). Carrier frequency division multiple access) system and the like.

  Since a large number of communication devices require a larger communication capacity, there is an increasing need for mobile broadband communication that is improved as compared with the existing RAT (radio access technology). Also, large-scale MTC (Machine Type Communications), which provides a variety of services anytime and anywhere by connecting a large number of devices and things, has been considered in next-generation communication. Furthermore, a communication system design considering a service / UE that is sensitive to reliability and delay has been considered.

  The introduction of the next-generation RAT in consideration of such improved mobile broadband communication, large-scale MTC, URLLC (Ultra-Reliable and Low Latency Communication), and the like is being discussed.

  An object of the present invention is to provide a method in which a terminal transmits uplink control information in a newly proposed communication system.

  In particular, the present invention relates to a method for mapping an uplink control channel of a terminal when the terminal transmits uplink control information via a physical uplink shared channel in a newly proposed communication system, and an uplink of the terminal based on the method. An object is to provide a transmission operation of control information.

  The technical objects to be achieved by the present invention are not limited to the matters mentioned above, and other technical problems which are not mentioned are based on the embodiments of the present invention described below from the technology to which the present invention belongs. It may be considered by those having ordinary knowledge in the field.

  The present invention provides a method and apparatus for transmitting uplink control information by a terminal in a wireless communication system.

  According to one aspect of the present invention, in a method in which a terminal transmits uplink control information to a base station in a wireless communication system, the uplink control information is mapped to a physical uplink shared channel (PUSCH), and the uplink is mapped to a physical uplink shared channel (PUSCH). The acknowledgment information included in the control information is obtained by applying rate-matching or puncturing to a resource for transmitting acknowledgment information in the PUSCH based on the size of the acknowledgment information. The present invention proposes a method for transmitting uplink control information of a terminal, including transmitting uplink control information mapped to a PUSCH and mapped uplink control information via the PUSCH.

  As another aspect of the present invention, a terminal for transmitting uplink control information to a base station in a wireless communication system includes a transmitting unit, and a processor operatively connected to the transmitting unit, the processor comprising: The control information is mapped to a physical uplink shared channel (PUSCH), and the acknowledgment information included in the uplink control information transmits acknowledgment information in the PUSCH based on the size of the acknowledgment information. Proposes a terminal configured to apply rate-matching or puncturing to resources to be mapped and to be mapped to PUSCH, and to transmit the mapped uplink control information via PUSCH. I do.

  At this time, if the size of the acknowledgment information exceeds a certain value, the acknowledgment information is mapped to the PUSCH by applying rate matching to the resource transmitting the acknowledgment information in the PUSCH, and the size of the acknowledgment information is When the acknowledgment information is equal to or less than a certain value, the acknowledgment information is mapped to the PUSCH by applying puncturing to the resource for transmitting the acknowledgment information in the PUSCH.

  At this time, the acknowledgment information is not mapped to a symbol preceding a symbol in the PUSCH where a first demodulation reference signal (DM-RS) is transmitted.

  Further, when channel state information (CSI) is included in uplink control information, the CSI is mapped to the PUSCH by applying rate matching to a resource for transmitting the CSI in the PUSCH.

  In this case, the CSI is mapped only to resources other than resources of a certain size reserved for acknowledgment information in the PUSCH.

  Also, the size of the acknowledgment information is determined based on an uplink DAI (Downlink Assignment Index) value in an uplink grant received from the base station.

  Further, the size of the resource for transmitting the acknowledgment information in the PUSCH is determined based on the first beta parameter. At this time, if one of the sets set by the upper layer signaling is indicated by the uplink grant, the first beta parameter is the acknowledgment information among the plurality of beta parameters included in one set. Corresponds to one beta parameter determined based on the size of

  Part or all of the uplink control information is mapped to a resource in a symbol in which a demodulation reference signal (Demodulation Reference Signal) in the PUSCH is transmitted.

  When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH, rate matching or puncturing is performed based on the payload of the maximum uplink control information dedicated to the SPS PUSCH.

  When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH, rate matching or puncturing is performed based on a beta offset value included in downlink control information for activating the SPS PUSCH.

  The aspects of the present invention described above are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention may be applied to those having ordinary knowledge in the art. Will be derived and understood based on the following detailed description of the invention.

  According to the embodiment of the present invention, the following effects can be obtained.

  According to the present invention, when the terminal maps the acknowledgment information of the uplink control information to the physical uplink shared channel, the terminal performs rate matching or puncturing according to the payload size of the acknowledgment information to perform acknowledgment information. It can be mapped to a physical uplink shared channel.

  Accordingly, depending on the payload size of the acknowledgment information, the terminal applies a mapping method that is advantageous in terms of the physical uplink shared channel performance or advantageous in terms of the complexity of the terminal, and the uplink including the acknowledgment information is applied. The control channel can be transmitted via a physical uplink shared channel.

  The effects obtained from the embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned are described in the following description of the embodiments of the present invention. Will be clearly derived and understood by those with knowledge of That is, unintended effects associated with practicing the present invention can also be derived from the embodiments of the present invention by those having ordinary knowledge in the art.

BRIEF DESCRIPTION OF THE DRAWINGS The following drawings are for the purpose of facilitating understanding of the present invention, and provide examples of the present invention together with the detailed description. However, the technical features of the present invention are not limited to a specific drawing, and the features disclosed in each drawing may be combined with each other to constitute a new embodiment. Reference numbers in each drawing refer to structural elements.
FIG. 3 is a diagram for explaining physical channels and a signal transmission method using them. FIG. 3 is a diagram illustrating an example of a structure of a radio frame. FIG. 3 is a diagram illustrating a resource grid for a downlink slot. FIG. 3 is a diagram illustrating an example of a structure of an uplink subframe. FIG. 3 is a diagram illustrating an example of a structure of a downlink subframe. FIG. 4 is a diagram illustrating a self-contained subframe structure applicable to the present invention. It is a figure which shows the typical connection system of TXRU and an antenna element. It is a figure which shows the typical connection system of TXRU and an antenna element. FIG. 4 is a simplified diagram of a hybrid beamforming structure in terms of a TXRU and a physical antenna according to an example of the present invention. FIG. 5 is a diagram simply illustrating a beam sweeping operation for a synchronization signal and system information in a downlink (DL) transmission process according to an example of the present invention. FIG. 3 is a diagram schematically illustrating a first UCI transmission method according to the present invention. For the output bitstream of the (circular) buffer with a particular RV value, the UCI is performed while puncturing the data from the last bit and back (based on the order between the bits in the input bitstream of the (circular) buffer). It is a figure which shows operation | movement which inserts simply. FIG. 4 simply illustrates a method of distributing UCI across coded CBs based on puncturing or rate matching (for data bits in the coded CB). FIG. 9 is a diagram simply showing a UCI mapping method by a method # 1 for the front three symbols. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 5 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 5 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 5 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 6 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 6 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 6 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 6 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 6 proposed in the present invention. FIG. 11 is a diagram simply illustrating an example of a UCI mapping method according to a method # 6 proposed in the present invention. FIG. 7 is a diagram simply illustrating an example in which an encoded UCI bit has an RE mapping order preceding an encoded data bit. FIG. 7 is a diagram simply illustrating an example in which an encoded UCI bit has an RE mapping order preceding an encoded data bit. FIG. 4 is a diagram illustrating an example of a UCI RE mapping method according to the present invention. FIG. 9 is a diagram simply illustrating a UCI mapping method when two REs having two subcarrier intervals are set as one REG. FIG. 9 is a diagram simply illustrating a UCI mapping method when two REs having two subcarrier intervals are set as one REG. FIG. 9 is a diagram simply illustrating a UCI mapping method when two REs having five subcarrier intervals are set as one REG. FIG. 11 is a diagram simply illustrating a UCI mapping method when two REs having four symbol intervals are set as one REG. FIG. 9 is a diagram simply illustrating an operation of mapping a UCI alternately between REGs when each REG is composed of M REs dispersed on the same symbol. FIG. 9 is a diagram simply illustrating an operation of mapping a UCI alternately between REGs when each REG is composed of M REs dispersed on the same symbol. FIG. 7 is a diagram simply illustrating an operation of mapping a UCI alternately between REGs when each REG is configured with M REs dispersed on the same subcarrier. FIG. 7 is a diagram simply illustrating an operation of mapping a UCI alternately between REGs when each REG is configured with M REs dispersed on the same subcarrier. FIG. 9 is a diagram simply illustrating a UCI mapping operation of a UE when a base station allows a terminal to perform UCI mapping on first, fourth, seventh, tenth, and thirteenth symbols. FIG. 11 is a diagram illustrating a case where PUSCH1 and UCI are transmitted, and PUSCH2 is transmitted in a minislot having a length of 2 symbols at the fourth and fifth symbol positions. It is a figure which shows each mapping pattern of DM-RS when transmitting PUSCH without UCI piggyback, and when transmitting PUSCH to which UCI piggyback was applied. It is a figure which shows that PUSCH DM-RS and PT-RS (Phase Tracking-Reference Signal) exist in a slot. It is a figure which shows the structure which performs RE mapping with respect to HARQ-ACK with respect to seven REs of a front side first, and then performs RE mapping with respect to 25 REs regarding CSI after that. FIG. 9 is a diagram simply illustrating an operation of emptying a front RE in consideration of HARQ-ACK transmission resources and performing RE mapping when a UE performs RE mapping for CSI. FIG. 7 is a diagram simply illustrating a configuration in which a UE performs UCI mapping in the order of HARQ-ACK → CSI part 1 → CSI part 2 → data. FIG. 7 is a diagram simply illustrating a UCI mapping configuration when a PUSCH length is 12 OFDM symbols and DM-RS symbols are present in OFDM symbol indexes # 2 and # 11, respectively. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK. FIG. 9 is a diagram simply illustrating a UCI mapping method when the method in Case 6 is applied to each frequency hop in the present invention. 5 is a flowchart simply showing a UCI transmission method applicable to the present invention. FIG. 11 is a diagram illustrating a configuration of a terminal and a base station that can implement the proposed embodiment;

  In the following embodiments, components and features of the present invention are combined in a predetermined form. Each component or feature may be considered optional unless explicitly stated otherwise. Each component or feature may be embodied in a form that is not combined with another component or feature, or some components and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of one embodiment may be included in another embodiment, or may be replaced with corresponding configurations or features of another embodiment.

  In the description of the drawings, procedures or steps that may obscure the gist of the present invention will not be described, and descriptions of procedures or steps that can be understood by those skilled in the art will also be omitted.

  Throughout the specification, when a part is referred to as "comprising or including", this does not exclude other elements, unless otherwise stated. It means that it can further include components. In addition, terms such as “unit”, “unit”, and “module” in the specification mean a unit for processing at least one function or operation, which is hardware, software, or hardware and software. It can be realized by combining software. Also, "a" or "an", "one", "the" and similar related terms are used in the context of describing the invention (especially in the context of the following claims). Unless otherwise indicated herein or otherwise clearly refuted by context, the terms "a" and "an" may be used to include both the singular and the plural.

  In this specification, embodiments of the present invention have been described focusing on the data transmission / reception relationship between a base station and a mobile station. Here, the base station has a meaning as a terminal node of the network that directly communicates with the mobile station. The specific operation described as being performed by the base station in this document may be performed by an upper node of the base station in some cases.

  That is, in a network including a plurality of network nodes including a base station, various operations performed for communication with the mobile station can be performed by the base station or another network node other than the base station. it can. At this time, the “base station” can be rephrased into a term such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point (access point). it can.

  Also, in the embodiment of the present invention, a terminal (Terminal) is a user equipment (UE: User Equipment), a mobile station (MS: Mobile Station), a subscriber terminal (SS: Subscriber Station), a mobile subscriber terminal (MSS: It can be rephrased into terms such as Mobile Subscriber Station, mobile terminal (Mobile Terminal), and advanced mobile terminal (AMS: Advanced Mobile Station).

  Also, the transmitting end refers to a fixed and / or mobile node providing a data service or a voice service, and the receiving end refers to a fixed and / or a mobile node receiving a data service or a voice service. Therefore, in the uplink, the mobile station can be the transmitting end and the base station can be the receiving end. Similarly, in the downlink, the mobile station can be the receiving end and the base station can be the transmitting end.

  An embodiment of the present invention relates to a wireless connection system IEEE 802. xx system, 3GPP (3rd Generation Partnership Project) system, 3GPP LTE system and 3GPP2 system, and can be supported by standard documents disclosed in at least one of the 3GPP TS36. 211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321 and 3GPP TS 38.331. That is, in the embodiments of the present invention, obvious steps or portions that are not described can be described with reference to the above document. In addition, any terms disclosed in this document can be explained by the above standard document.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be implemented.

  In addition, specific terms used in the embodiments of the present invention are provided for easy understanding of the present invention, and the use of such specific terms may be changed without departing from the technical idea of the present invention. It may be changed to a form.

  For example, the term Transmission Opportunity Period (TxOP) may be used interchangeably with the terms transmission interval, transmission burst (Tx burst), or RRP (Reserved Resource Period). Also, an LBT (Listen Before Talk) process has the same purpose as a carrier sensing process for determining whether a channel state is idle, a CCA (Clear Channel Accession), and a channel connection process (CAP: Channel Access Procedure). It can be carried out.

  Hereinafter, a 3GPP LTE / LTE-A system will be described as an example of a wireless connection system that can use the embodiments of the present invention.

  The following technologies, CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access), etc. Can be applied to various wireless connection systems.

  CDMA can be realized by radio technology (radio technology) such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA is a radio technology that can be realized by a radio technology such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented by a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), and the like.

  UTRA is a part of UMTS (Universal Mobile Telecommunications System). 3GPP LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) using E-UTRA, and employs OFDMA on the downlink and SC-FDMA on the uplink. The LTE-A (Advanced) system is an improved version of the 3GPP LTE system. In order to clarify the description of the technical features of the present invention, the embodiments of the present invention will be described focusing on a 3GPP LTE / LTE-A system, but may be applied to an IEEE 802.16e / m system or the like.

1.3 GPP LTE / LTE A system

  1.1. Physical channel and signal transmission / reception method using the same

  In a wireless connection system, a terminal receives information from a base station on a downlink (DL: Downlink) and transmits information to the base station on an uplink (UL: Uplink). The information transmitted and received between the base station and the terminal includes general data information and various control information, and there are various physical channels depending on the type / use of the information transmitted and received between the base station and the terminal.

  FIG. 1 is a diagram illustrating a physical channel usable in an embodiment of the present invention and a signal transmission method using the physical channel.

  In step S11, a terminal that has been turned on or has newly entered a cell while the power is off performs an initial cell search operation such as synchronization with a base station. To this end, the terminal receives a primary synchronization channel (P-SCH: Primary Synchronization Channel) and a secondary synchronization channel (S-SCH: Secondary Synchronization Channel) from the base station, synchronizes with the base station, and acquires information such as a cell ID. get.

  Thereafter, the terminal can receive a physical broadcast channel (PBCH) signal from the base station and acquire in-cell broadcast information.

  Meanwhile, the UE can receive a DL RS (Downlink Reference Signal) at an initial cell search stage and check a downlink channel state.

  In step S12, the terminal that has completed the initial cell search determines a physical downlink control channel (PDCCH: Physical Downlink Control Channel) and a physical downlink shared channel (PDSCH: Physical Downlink Control Channel) corresponding to the physical downlink control channel information. And more specific system information can be obtained.

  Thereafter, the terminal may perform a random access procedure (Steps S13 to S16) to complete the connection to the base station. To this end, the terminal transmits a preamble on a Physical Random Access Channel (PRACH) (S13), and receives a response message for the preamble on a physical downlink control channel and a corresponding physical downlink shared channel. Can be performed (S14). In contention-based random access, the terminal may perform collision resolution such as transmitting a further physical random access channel signal (S15) and receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S16). A procedure (Contention Resolution Procedure) can be performed.

  The terminal that has performed the above-described procedure then receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S17) and performs a physical uplink / downlink signal transmission procedure as a general uplink / downlink signal transmission procedure. A Physical Uplink Shared Channel (PUSCH) signal and / or a Physical Uplink Control Channel (PUCCH) signal can be transmitted (S18).

  Control information transmitted from a terminal to a base station is collectively referred to as uplink control information (UCI: Uplink Control Information). UCI is based on HARQ-ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request Information, CQI (Channel Information and Rental Information), etc.). .

  In the LTE system, UCI is generally transmitted periodically on PUCCH, but may be transmitted on PUSCH if control information and traffic data are to be transmitted simultaneously. Also, UCI can be transmitted aperiodically on PUSCH according to a request / instruction of the network.

  1.2. Resource structure

  FIG. 2 is a diagram illustrating a structure of a radio frame used in the embodiment of the present invention.

  FIG. 2A shows a type 1 frame structure (frame structure type 1). The type 1 frame structure can be applied to both a full duplex FDD (Frequency Division Duplex) system and a half duplex FDD system.

  One radio frame has a length of Tf = 307200 * Ts = 10 ms, has a uniform length of Tslot = 15360 * Ts = 0.5 ms, and is given an index of 0 to 19. It consists of 20 slots. One subframe is defined by two consecutive slots, and the i-th subframe includes slots corresponding to 2i and 2i + 1. That is, a radio frame is composed of ten subframes. The time required to transmit one subframe is called TTI (transmission time interval). Here, Ts represents a sampling time, and is expressed as Ts = 1 / (15 kHz × 2048) = 3.2552 × 10−8 (about 33 ns). A slot includes a plurality of OFDM symbols or SC-FDMA symbols in a time domain, and includes a plurality of resource blocks in a frequency domain.

  One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain. Since 3GPP LTE uses OFDMA in the downlink, the OFDM symbol is for expressing one symbol period (symbol period). An OFDM symbol can be referred to as one SC-FDMA symbol or symbol section. A resource block is a resource allocation unit, and includes a plurality of continuous subcarriers in one slot.

  In a full-duplex FDD system, 10 subframes can be simultaneously used for downlink transmission and uplink transmission in each 10 ms section. At this time, uplink and downlink transmissions are separated in the frequency domain. In contrast, in a half-duplex FDD system, a terminal cannot transmit and receive at the same time.

  The structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, or the number of OFDM symbols included in the slot may be variously changed. .

  FIG. 2B shows a type 2 frame structure (frame structure type 2). The type 2 frame structure is applied to a TDD system. One radio frame has a length of Tf = 307200 * Ts = 10 ms, and is composed of two half-frames having a length of 153600 * Ts = 5 ms. Each half frame is composed of five subframes having a length of 30720 * Ts = 1 ms. The i-th subframe is composed of two slots having a length of Tslot = 15360 * Ts = 0.5 ms corresponding to 2i and 2i + 1. Here, Ts represents a sampling time, and is expressed as Ts = 1 / (15 kHz × 2048) = 3.2552 × 10−8 (about 33 ns).

  The type 2 frame includes a special subframe including three fields of a DwPTS (Downlink Pilot Time Slot), a guard interval (GP: Guard Period), and an UpPTS (Uplink Pilot Time Slot). Here, DwPTS is used for initial cell search, synchronization, or channel estimation in a terminal. UpPTS is used for channel estimation in a base station and uplink transmission synchronization with a terminal. The protection section is a section for removing interference in the uplink due to a multipath delay of a downlink signal between the uplink and the downlink.

  Table 1 below shows the configuration of the special frame (the length of DwPTS / GP / UpPTS).

  FIG. 3 is a diagram illustrating a resource grid for a downlink slot available in an embodiment of the present invention.

  Referring to FIG. 3, one downlink slot includes a plurality of OFDM symbols in a time domain. Here, one downlink slot includes seven OFDM symbols and one resource block includes twelve subcarriers in the frequency domain. However, the present invention is not limited to this.

  Each element on the resource grid is called a resource element, and one resource block includes 12 × 7 resource elements. The number NDL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth. The structure of the uplink slot may be the same as the structure of the downlink slot.

  FIG. 4 shows a structure of an uplink subframe usable in the embodiment of the present invention.

  Referring to FIG. 4, an uplink subframe can be divided into a control area and a data area in a frequency domain. A PUCCH that carries uplink control information is assigned to the control region. A PUSCH carrying user data is allocated to the data area. One terminal does not transmit PUCCH and PUSCH simultaneously to maintain the single carrier characteristic. An RB pair is allocated to a PUCCH for one terminal in a subframe. RBs belonging to an RB pair occupy different subcarriers in each of the two slots. It is said that the RB pairs allocated to the PUCCH perform frequency hopping at a slot boundary.

  FIG. 5 is a diagram illustrating a structure of a downlink subframe usable in the embodiment of the present invention.

  Referring to FIG. 5, in the first slot of a subframe, up to three OFDM symbols from OFDM symbol index 0 are a control region to which a control channel is allocated, and the remaining OFDM symbols are PDSCH. Is a data region to be allocated. Examples of the downlink control channel used in 3GPP LTE include PCFICH (Physical Control Format Indicator Channel), PDCCH, and PHICH (Physical Hybrid-ARQ Indicator Channel).

  The PCFICH is transmitted in the first OFDM symbol of the subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of the control channel in the subframe. The PHICH is a response channel for the uplink, and carries an ACK (Acknowledgment) / NACK (Negative-Acknowledgment) signal for HARQ (Hybrid Automatic Repeat Request). Control information transmitted on the PDCCH is called downlink control information (DCI). The downlink control information includes uplink resource allocation information, downlink resource allocation information, or an uplink transmission (Tx) power control command for an arbitrary terminal group.

  1.3. CSI feedback

  In 3GPP LTE or LTE-A systems, it is defined that a user equipment (UE) reports channel state information (CSI) to a base station (BS or eNB). Here, the channel state information (CSI) collectively refers to information indicating the quality of a radio channel (or link) formed between a UE and an antenna port.

  For example, the channel state information (CSI) includes a rank indicator (rank indicator, RI), a precoding matrix indicator (PMI), a channel quality indicator (CQI), and the like.

  Here, the RI indicates rank information of the corresponding channel, which means the number of streams that the UE receives via the same time-frequency resource. This value is dependent on and determined by the long term fading of the channel. The RI is then typically fed back to the BS by the UE at a longer period than the PMI, CQI.

  PMI is a value reflecting channel space characteristics, and indicates a precoding index preferred by the UE based on a metric such as SINR.

  The CQI is a value indicating the channel strength and usually means a reception SINR obtained when the BS uses the PMI.

  In a 3GPP LTE or LTE-A system, a base station sets a plurality of CSI processes in a UE and receives a report of CSI for each process from the UE. Here, the CSI process includes CSI-RS for specifying signal quality from a base station and CSI-interference measurement (CSI-IM) resources for interference measurement.

  1.4. RRM measurement

  In the LTE system, power control (Scheduling), cell search (Cell search), cell reselection (Cell reselection), handover (Handover), radio link or connection monitoring (Radio link or Connection monitoring). It supports RRM (Radio Resource Management) operations, including connection establishment / re-establishment. At this time, the serving cell may request the terminal for RRM measurement information, which is a measurement value for performing an RRM operation. As typical information, in the LTE system, a terminal can measure and report information such as cell search (Cell search) information, reference signal received power (RSRP), and reference signal received quality (RSRQ) for each cell. Specifically, in the LTE system, the terminal transmits “measConfig” as an upper layer signal for RRM measurement from the serving cell, and the terminal measures RSRP or RSRQ according to the information of “measConfig”.

  Here, RSRP, RSRQ, and RSSI defined in the LTE system are defined as follows.

  First, RSRP is defined as a linear average of a power distribution (power unit, [W] unit) of a resource element transmitting a cell-specific reference signal in a measurement frequency band to be considered. (Reference signal received power (RSRP), is defined as the linear average over the power contributions (in [W]) of the resource elements that carry cell-specific reference signals within the considered measurement frequency bandwidth.) As an example, the RSRP decision Therefore, the cell-specific reference signal R0 can be used. (For RSRP determination the cell-specific reference signals R0 short be used.) If the UE detects that the cell-specific reference signal R1 is available, the UE further uses R1 to determine the RSRP. (If the UE can detect detect that R1 is available it may use R1 in addition to R0 to determine RSRP.)

  The reference point for RSRP can be the antenna connector of the UE. (The reference point for the RSRP shall be the antenna connector of the UE.)

  If the UE uses receiver diversity, the reported value must not be less than the RSRP corresponding to the individual diversity branch. (If receive diversity is in use by the UE, the reported value shall not be lower than the coordination of the RSRP of any of the following reviews.)

  Then, when N is the number of RBs in the E-UTRA carrier RSSI measurement bandwidth, RSRQ is defined as the ratio of RSRP to E-UTRA carrier RSSI as N * RSRP / (E-UTRA carrier RSSI). (Reference Signal Received Quality (RSRQ) is defined as the ratio N multiplied by RSRP / (E-UTRA carrier RSSI), where this is the number of the RB's each next-to-date value of the RB's of the next- And the numerator is determined by the same set of resource blocks. (The measurements in the numerator and denominator short be made over the same set of resource blocks.)

  The E-UTRA carrier RSSI has a measured bandwidth over N resource blocks for received signals from all sources including co-channel serving and non-serving cells, adjacent channel interference, thermal noise, etc. Contains the linear average of the total received power (in [W] units) measured by the terminal only in the OFDM symbol including the reference symbol for antenna port 0. (E-UTRA Carrier Received Signal Strength Indicator (RSSI), comprises the linear average of the total received power (in [W]) observed only in OFDM symbols containing reference symbols for antenna port 0, in the measurement bandwidth, over N number of resource blocks by the UE from all sources, including co-channel SERVING and non-SERVING cells, adjacen t channel interference, thermal noise etc.) If the upper layer signaling indicates a certain subframe for RSRQ measurement, RSSI is measured for all OFDM symbols in the indicated subframe. (If higher-layer signaling indices certin subframes for performing RSRQ measurements, the RSSI is measured over all of the in-development insem.

  The reference point for RSRQ can be the antenna connector of the UE. (The reference point for the RSRQ shall be the antenna connector of the UE.)

  If the UE uses receiver diversity, the reported value must not be lower than the RSRQ corresponding to the individual diversity branch. (If receive diversity is in use by the UE, the reported value shall not be lower than the coordinating RSRQ of any of the remaining invitations.)

  The RSSI is then defined by the received broadband power, including thermal noise within the bandwidth defined by the receiver pulsed filter and noise generated by the receiver. (Received Signal Strength Indicator (RSSI) is defined as the received wide band power, including thermal noise and noise generated in the receiver, within the bandwidth defined by the receiver pulse shaping filter.)

  The reference point for the measurement can be the antenna connector of the UE. (The reference point for the measurement shall be the antenna connector of the UE.)

  If the UE uses receiver diversity, the reported value must not be less than the UTRA carrier RSSI corresponding to the individual diversity branch. (If receive diversity is in use by the UE, the reported value shall not be lower than the corporation of the UTRA carrier annual sighting system.

  According to the above definition, a terminal operating in the LTE system, in the case of intra-frequency measurement (Intra-frequency measurement), an allowed measurement bandwidth (Allowed measurement bandwidth) transmitted from an SIB3 (system information block type 3). RSRP can be measured in a bandwidth indicated via an information element (IE). Also, in the case of an intra-frequency measurement (Inter-frequency measurement), the terminal indicates 6, 15, 25, 50, 75, and 100 RBs (resource block) via the allowed measurement bandwidth transmitted from the SIB5. RSRP can be measured in a bandwidth corresponding to one of the above. Also, if there is no IE as described above, the terminal can measure RSRP in the frequency band of the entire downlink (DL) system as a default operation.

  At this time, when the terminal receives the information on the allowed measurement bandwidth, the terminal can freely measure the value of RSRP at the value by setting the value as a maximum measurement bandwidth. However, when the serving cell transmits an IE defined as WB-RSRQ to the terminal and sets the allowed measurement bandwidth to 50 RB or more, the terminal needs to calculate all RSRP values for the allowed measurement bandwidth. is there. On the other hand, when measuring the RSSI, the terminal measures the RSSI using the frequency band of the receiver of the terminal according to the definition of the RSSI bandwidth.

2. New radio access technology (New Radio Access Technology) system

  2. Description of the Related Art As a large number of communication devices demand larger communication capacities, there is a growing need for improved terminal broadband (Mobile Broadband) communication as compared to existing wireless access technology (RAT). Also, there is a need for a large-scale MTC (Machine Type Communications) that provides various services anytime and anywhere by connecting a large number of devices and things. Furthermore, a communication system design considering a service / UE sensitive to reliability and delay has been proposed.

  A new wireless connection technology system has been proposed, which is a new wireless connection technology that takes into account enhanced mobile broadband communication, large-scale MTC, and URL-LC (Ultra-Reliable and Low Latency Communication). I have. Hereinafter, in the present invention, the corresponding technology is referred to as New RAT or NR (New Radio) for convenience.

  2.1. New Marology (Numeriologies)

  In the NR system to which the present invention can be applied, various OFDM pneumology as shown in the following table is supported. At this time, the μ and the cyclic prefix information for each carrier bandwidth part are signaled for each downlink (DL) or uplink (UL). As an example, μ and cyclic prefix information for a downlink carrier bandwidth part are signaled via upper layer signaling DL-BWP-mu and DL-MWP-cp. As another example, μ and cyclic prefix information for an uplink carrier bandwidth part is signaled via upper layer signaling UL-BWP-mu and UL-MWP-cp. .

  2.2. Frame structure

Downlink and uplink transmissions consist of 10 ms long frames. The frame is composed of 10 subframes having a length of 1 ms. At this time, the number of consecutive OFDM symbols for each subframe is
It is.

  Each frame is made up of two equal-sized half-frames. At this time, each half frame is composed of subframes 0-4 and 5-9.

For subcarrier spacing μ, slots are ordered in ascending order within one subframe.
, And ascending within one frame
Numbered like At this time, the number of consecutive OFDM symbols in one slot (
) Is determined by the cyclic prefix as shown in the table below. Start slot in one subframe (
) Is the starting OFDM symbol in the same subframe (
) And time dimension (aligned). Table 3 below shows the number of OFDM symbols per slot / frame / subframe for normal cyclic prefix, and Table 4 shows the extended cyclic prefix. For each slot / frame / subframe, the number of OFDM symbols is shown.

  In an NR system to which the present invention can be applied, a self-slot structure (Self-Contained subframe structure) having the above-described slot structure is applied.

  FIG. 6 is a diagram illustrating a self-contained subframe structure applicable to the present invention.

  In FIG. 6, a shaded area (for example, symbol index = 0) indicates a downlink control (downlink control) area, and a black area (for example, symbol index = 13) indicates an uplink control (uplink control) area. Other areas (for example, symbol index = 1 to 12) are used for downlink data transmission or uplink data transmission.

  With this structure, the base station and the UE can sequentially perform DL transmission and UL transmission in one slot, transmit and receive DL data in one slot, and transmit and receive UL ACK / NACK for the DL data. it can. As a result, this structure can minimize the delay of the final data transmission by reducing the time required for data retransmission when a data transmission error occurs.

  In such a self-slot structure, a time gap of a certain length of time is required for the base station and the UE to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode. To this end, some OFDM symbols at the time of conversion from DL to UL in the self-slot structure can be set as a guard period (GP).

  Although the case where the self-slot structure includes both the DL control area and the UL control area has been described above, the control area can be selectively included in the self-slot structure. That is, as shown in FIG. 6, the self-slot structure according to the present invention may include not only the DL control area and the UL control area but also the DL control area or the UL control area.

  As an example, slots can have various slot formats. At this time, the OFDM symbols of each slot are classified into a downlink (represented by 'D'), a flexible (represented by 'X'), and an uplink (represented by 'U').

  Therefore, in the downlink slot, the UE can assume that downlink transmission occurs only on the 'D' and 'X' symbols. Similarly, in the uplink slot, the UE can assume that the uplink transmission only occurs on 'U' and 'X' symbols.

  2.3. Analog beamforming (Analog Beamforming)

  Since the wavelength is short in a millimeter wave (Millimeter Wave, mmW), a large number of antenna elements can be installed in the same area. That is, since the wavelength is 1 cm in the 30 GHz band, a total of 100 antenna elements can be provided in a two-dimensional (2-dimension) arrangement at 0.5 lambda (wavelength) intervals on a 5 * 5 cm panel. Accordingly, in a millimeter wave (mmW), a large number of antenna elements can be used to increase the beamforming (BF) gain to increase the coverage or improve the throughput.

  At this time, each antenna element includes a TXRU (transceiver) so that transmission power and phase can be adjusted for each antenna element. This allows each antenna element to perform independent beamforming for each frequency resource.

  However, providing TXRUs for all 100 or more antenna elements is not cost effective. Therefore, a method has been considered in which a large number of antenna elements are mapped to one TXRU, and the beam direction is adjusted by an analog phase shifter. In such an analog beam forming method, since only one beam direction can be formed in the entire band, there is a disadvantage that it is difficult to form a beam in a frequency selective manner.

  To solve this, hybrid beamforming (hybrid BF) having B TXRUs less than Q antenna elements is considered as an intermediate form between digital beamforming and analog beamforming. In this case, although there is a difference depending on the connection scheme between the B TXRUs and the Q antenna elements, the directions of beams that can be transmitted simultaneously are limited to B or less.

  7 and 8 are diagrams illustrating a typical connection scheme between a TXRU and an antenna element. Here, the TXRU virtualization model indicates the relationship between the output signal of the TXRU and the output signal of the antenna element.

  FIG. 7 illustrates a method in which TXRUs are connected to a sub-array. In the case of FIG. 7, the antenna element is connected to only one TXRU.

  On the other hand, FIG. 8 shows a scheme in which a TXRU is connected to all antenna elements. In the case of FIG. 8, the antenna element is connected to all TXRUs. At this time, in order to connect the antenna element to all TXRUs, another adder is required as shown in FIG.

  7 and 8, W represents a phase vector multiplied by an analog phase shifter. That is, W is a main parameter that determines the direction of analog beam formation. Here, the mapping between the CSI-RS antenna port and the plurality of TXRUs is 1: 1 or 1: many.

  According to the configuration of FIG. 7, there is a disadvantage that focusing in beam forming is difficult, but there is an advantage that all antenna configurations can be configured at low cost.

  According to the configuration of FIG. 8, there is an advantage that focusing of beam forming is easy. However, since the TXRU is connected to all the antenna elements, there is a disadvantage that the overall cost increases.

  When a plurality of antennas are used in an NR system to which the present invention can be applied, a hybrid beamforming method that combines digital beamforming and analog beamforming is applied. At this time, analog beamforming (or RF (radio frequency) beamforming) means an operation of performing precoding (or combining) at an RF end. In the hybrid beam forming, the baseband end and the RF end are each pre-coated (or combined). As a result, there is an advantage in that the number of RF chains and the number of D / A (Digital to analog) (or A / D (Analog to digital)) converters can be reduced, and performance close to digital beam forming can be obtained.

  For convenience of description, the structure of hybrid beamforming can be represented by N transceiver units (TXRUs) and M physical antennas. At this time, digital beam forming for the L data layers transmitted from the transmitting end is represented by an N * L (L by L) matrix. Thereafter, the converted N digital signals are converted into analog signals via the TXRU, and analog beamforming represented by an M * N (M by N) matrix is applied to the converted signals.

  FIG. 9 is a diagram schematically illustrating a structure of hybrid beamforming in terms of a TXRU and a physical antenna according to an example of the present invention. At this time, in FIG. 9, the number of digital beams is L and the number of analog beams is N.

  Further, in the NR system to which the present invention can be applied, a method is considered in which a base station is designed to be able to change analog beam forming in units of symbols, and supports efficient beam forming for terminals located in a predetermined area. Can be Further, as shown in FIG. 9, when predetermined N TXRUs and M RF antennas are defined in one antenna panel, in the NR system according to the present invention, independent hybrid beamforming can be applied. A method of introducing a plurality of antenna panels is also conceivable.

  As described above, when a base station utilizes a plurality of analog beams, an analog beam advantageous for signal reception differs for each terminal. Therefore, in the NR system to which the present invention can be applied, the base station applies a different analog beam for each symbol within a predetermined subframe (SF) (at least a synchronization signal, system information, paging, etc.) to generate a signal. A beam sweeping (beam sweeping) operation has been considered in which all terminals obtain a reception opportunity by transmitting.

  FIG. 10 is a diagram simply illustrating a beam sweeping operation for a synchronization signal and system information in a downlink (DL) transmission process according to an example of the present invention.

  In FIG. 10, a physical resource (or a physical channel) in which system information of an NR system to which the present invention can be applied is transmitted by a broadcasting method is referred to as an xPBCH (physical broadcast channel). At this time, a plurality of analog beams belonging to different antenna panels in one symbol can be transmitted simultaneously.

  Further, as shown in FIG. 10, in the NR system to which the present invention can be applied, a configuration for measuring a channel for each analog beam, and a single analog beam (corresponding to a predetermined antenna panel) is applied The introduction of a beam reference signal (Beam RS, BRS), which is a reference signal (Reference signal, RS) that is transmitted after transmission, is being discussed. A BRS is defined for multiple antenna pots, each antenna pot of the BRS corresponding to a single analog beam. At this time, unlike the BRS, the synchronization signal or the xPBCH is transmitted by applying all analog beams in the analog beam group so that any terminal can receive the synchronization signal or xPBCH.

3. Proposed example

  In the present invention, based on the above-described technical idea, a physical uplink shared channel (PUSCH), which is a physical layer channel for UL data transmission of UCI (uplink control information) in a wireless communication system including a base station and a terminal. ) The UCI mapping method when transmitting to the resource area will be described in detail. In other words, the present invention describes in detail a specific method in which the UE transmits the UCI via the PUSCH.

  The conventional LTE system supports a configuration in which a terminal transmits UL data with higher transmission power by reducing PAPR (Peak to Average Power Ratio). Thereby, UL coverage can be increased. Therefore, in the conventional LTE system, the SC-FDMA (Single Carrier-Frequency Division Multiplexing Access) having the single carrier property or the DFT-s-OFDM (Discrete-Fourier-Fourier-Tourier-Fourier-Tourier-Fourier-Tourier-Fourier-Tourier-Fourier-Tourier-Fourier-Tourier-Fourier-Tourier-Fourier-Fourier-Fourier-Fourier-Tourier-Fourier-Fourier) The formula was applied. The SC-FDMA scheme is a scheme in which DFT precoding (or DFT spreading) is applied to data before an IDFT (Inverse Discrete Fourier Transform) (or IFFT (Inverse Fast Fourier Transform)) process by the OFDM scheme. After the terminal generates M data on the time axis, the M-point DFT block (M-point DFT block) and the N-point IDFT block (N-point IDFT block) of N points (where N ≧ M ), The time axis data of the terminal is converted into an upsampled time axis signal at an N / M ratio to satisfy a single carrier characteristic.

  However, in the NR system to which the present invention can be applied, not only SC-FDMA but also CP-OFDM (Cyclic Prefix-OFDM, that is, an OFDM system in which a DFT block is applied to data before OFDM) is used based on a PUSCH transmission waveform. PUSCH transmission can also be supported. At this time, when the PUSCH transmission based on the CP-OFDM is performed as described above, the NR system can support data and RS resource mapping that is relatively free from the constraint of a single carrier characteristic. This has the advantage that the RS overhead can be minimized by the channel.

  Therefore, in the NR system applicable to the present invention, the terminal can support all of the above two schemes as the PUSCH transmission scheme. Specifically, the terminal performs PUSCH transmission based on CP-OFDM when short UL coverage is sufficient due to the setting of the base station, and performs PUSCH transmission based on SC-OFDM when long UL coverage is required. It can be carried out.

  Also, in an NR system to which the present invention can be applied, a service such as a URL LCN can have a requirement of ultra-low latency. Therefore, in some cases, the URLLC data may be transmitted in a form in which the already transmitted eMBB data is punctured. As an example, when the terminal receives a PUSCH1 transmission instruction by the eMBB service, and then receives a PUSCH2 transmission instruction by the URLLC service in the PUSCH1 transmission target slot, the terminal transmits the PUSCH2 in a form of puncturing some PUSCH1 data in the slot. You can send.

  Also, in an NR system to which the present invention can be applied, UCI piggyback in which UCI is transmitted through a PUSCH region can be applied. At this time, a UCI mapping scheme in a different PUSCH is applied depending on whether the PUSCH transmission scheme is the CP-OFDM scheme or the SC-FDMA scheme. Also, a different UCI mapping method can be designed in consideration of puncturing by another service such as URLLC.

  In the following description, DCI (Dynamic Control Information) means a dynamic control signal.

  Also, in the following description, a resource element (RE) can be represented in a grid form of an OFDM resource as a time resource and a subcarrier resource as a frequency resource. Therefore, RE means a resource corresponding to a specific subcarrier and a specific OFDM symbol.

  In the following description, a DM-RS (demodulation reference signal) refers to a reference signal that supports a reception operation such as channel estimation for data demodulation.

  In the following description, a slot means a basic time unit for data scheduling, and is composed of a plurality of symbols. A mini-slot is a minimum time unit for data scheduling, and is defined to have a time section shorter than a slot. At this time, the symbol means an OFDM symbol or an SC-FDMA symbol.

  In the following description, time-first mapping (or frequency-first mapping) is a method of performing time-mapping on a specific frequency resource (or time resource) when performing RE mapping for the information. This means a method of allocating REs in the axis (or frequency axis) direction, and then performing RE allocation in the time axis (or frequency axis) direction again for other frequency resources (or time resources).

  In the drawings relating to the present invention, the numbers on the REs to which UCIs are assigned mean the order in which UCIs are mapped to REs.

  3.1. First UCI transmission method

  When the UE performs the UCI piggyback on the PUSCH, the UE combines the coded data bit (Coded data bit) and the coded UCI bit (Coded UCI bit) in a pre-modulation stage for the coded bit (Coded bit) to be transmitted to the PUSCH. After that, a signal obtained by modulating the combined coded bit (Coded bit) is mapped to the RE and transmitted to the PUSCH.

  At this time, if the coded bits that can be transmitted on the PUSCH are N bits and the coded UCI bits are M bits, the UE converts the coded data bits and the coded UCI bits by one of the following methods. Can be combined.

  (1) Generate encoded data bits according to the length of N bits, and then puncture some M bits of the encoded data bits and insert encoded UCI bits at corresponding positions

  (2) Generate encoded data bits according to the length of (N−M) bits, and then combine the encoded UCI bits

  Here, the M-bit information that is punctured with respect to the encoded data bits is sequential M-bit information in the direction from the least significant bit (LSB) to the most significant bit (MSB).

  Also, when the modulation order supports K bits, the length of the encoded UCI bits is limited to have a bit size represented by a multiple of K. By such an operation, data and UCI are separated in RE units, and allocation of additional power to UCI transmission REs and the like are applied.

  Also, bit level interleaving is applied in the process of combining the coded data bits and the coded UCI bits, and then, at the time of RE mapping of the modulated symbols, symbol level interleaving (Symbol level interleaving) is performed. ) Applies.

  FIG. 11 is a diagram schematically illustrating a first UCI transmission method according to the present invention.

  In FIG. 11, it is assumed that the number of coded bits (coded bits) that can be transmitted on the PUSCH is N, and the number of coded UCI bits is M. At this time, as in the method shown on the left side of FIG. 11, the UE punctures some M bits of the data bits coded in the pre-modulation stage (ie, the front end of the modulation block), and After modulating the entire coded bits by combining the coded data bits with the PUSCH, the modulated signal can be transmitted on the PUSCH. Alternatively, as in the method shown on the right side of FIG. 11, the UE performs rate-matching so that the length of encoded data bits is (NM) bits, and then combines the encoded UCI bits. be able to.

  When data and UCI are mixed before RE mapping to PUSCH in this way, the effect of interleaving in the RE mapping process of coded bits may be applied not only to data but also to UCI. it can. Therefore, there is an advantage that a time / frequency diversity (Time / Frequency diversity) gain can be obtained when transmitting UCI.

  Further, when the data is configured and transmitted in a plurality of code blocks (code blocks; CBs) or code block groups (CBGs), the encoded UCI bits are dispersed and transmitted in the CB or CBG. Can be. As an example, if the coded bits (coded bits) that can be transmitted on the PUSCH are N bits, the coded UCI bits are M bits, and the number of CBGs is L, the UE transmits the coded data bits as follows. And the encoded UCI bits.

_{1) N 1 + N 2 +} ... + N L = N bits satisfy _{{N 1, N 2, ...} , N L} and _{M 1 + M 2 + ... +} M L = satisfying M bit _{{M 1, M 2, ...} , Set M _L ｝. Then, after allocating N ₁ bits of encoded data bits to the l-th (eg, l = 1, 2,..., L) CBG for the L CBGs, some of the encoded data bits M Puncturing ₁ bit and inserting coded UCI bit at corresponding position.

_{2) N 1 + N 2 +} ... + N L = ( satisfy N-M) bits _{{N 1, N 2, ...} , N L} and _{M 1 + M 2 + ... +} M L = satisfying M bits _{M 1, M _2, ..., set the _{M L}.} Then, after allocating N _l encoded data bits to the l-th (eg, l = 1, 2,..., L) CBG for the L CBGs, M _l encoded UCI bits are further combined.

In the following description, RE (resource element) means a resource corresponding to one subcarrier of one OFDM symbol, and RB (resource block) or PRB (physical resource block) is M _{1 on the} time axis (eg, 7). Or 14) symbols and a resource allocation unit composed of M ₂ (eg, 12) subcarriers on the frequency axis.

  In the NR system to which the present invention can be applied, a channel coding chain according to the following series of processes is defined.

  [Channel coding chain]

  [1] TB (transport block). TB generation by TBS (transport block size)

  [2] TB CRC (Cyclic Redundancy Check) attachment (attachment). CRC applied to TB

  [3] Code block (CB) division (segmentation). Divide TB into multiple CBs (if TB is over a certain size)

  [4] CB CRC adhesion. Apply CRC to CB

  [5] Channel coding. Perform channel coding for each CB

  Here, coded bits are divided into systematic bit groups or n-th parity bits (eg, n = 1, 2, 3,...) Groups according to a channel coding method. At this time, a sub-block interleaver that mixes the order between bits in each bit group may be applied. Thereafter, additional interleaving may be applied between each bit group.

  [6] Rate matching. The coded bits for each CB are input to the (Circular) buffer by a specific procedure (eg, systematic bits → parity bits), and from a specific starting point in the (circular) buffer to the data transmission channel. Select an example of coded bits corresponding to the amount of bits that can be transmitted (per CB)

  Here, a specific start point in the (circular) buffer may be indicated by a DL scheduling DCI or a redundancy version (RV) in the DL scheduling DCI.

It is a circular buffer, and when L bits are selected for a specific CB, it corresponds to index (k ₀ ) mod K, index (k ₀ +1) mod K,..., Index (k ₀ + L) mod K L bits can be selected. Here, index k ₀ indicates the time point indicated by DCI or RV, and K indicates the entire size of the circular buffer.

  [7] CB concatenation. Combine coded bits for each CB

  [8] Channel interleaving. Perform data RE mapping

  Further, when data is transmitted in a plurality of CBs (or CBGs), the encoded UCI bits can be distributed to the CBs (or CBGs). At this time, in the rate matching stage of the channel coding chain for each CB (or CBG), the UE punctures the output bit stream from the (circular) buffer from the back side, and (partly) encoded UCI bits Can be inserted.

  More specifically, when RV (redundancy version) is 0, the output of the circular buffer is composed of systematic bits on the front side and parity bits on the rear side, and puncturing by inserting (partial) encoded UCI bits. Applies mainly to parity bits.

  Or in the rate matching stage of the channel coding chain for each CB (or CBG), the UE compares the output bit stream from the (circular) buffer with the parity bits between bits in the (cyclic) buffer input bit stream. The UCI can be inserted while puncturing the data from the last bit (based on the order) to the last bit (and vice versa based on the order between the bits in the input bitstream of the (circular) buffer). That is, the UE can replace (replace) the UCI from the last bit of the parity bits of the (circular) buffer.

  FIG. 12 punctures the parity bits from the last bit (from the order of the bits in the (circular) buffer input bitstream) backwards for the output bitstream of the (circular) buffer for a particular RV value. FIG. 9 is a diagram simply showing an operation of inserting a UCI while inserting.

  After the configuration of the coded CB (with or without interleaving), the UE can distribute the UCI for the entire coded CB. At this time, the UE can perform rate matching or puncturing on data bits in the coded CB, and can operate as follows.

  1] Assuming that the number of coded CB bits is N and the number of coded UCI bits is M, when the UE performs rate matching, the UE sets one UCI bit for every N / M CB bits. Can be inserted.

  2] Assuming that the number of coded CB bits is N and the number of coded UCI bits is M, when the UE performs puncturing, the UE performs bit information for every (NM) / Mth CB bit. Can be replaced by one UCI bit.

  3] Here, after modulating the coded bits obtained by combining the CB and the UCI, the UE can perform the RE mapping on the PUSCH resources to which the modulated symbols are allocated by a frequency priority (or time priority) method. At this time, the RE mapping of the frequency-priority (or time-priority) method first performs RE mapping on a frequency-axis (or time-axis) resource, and then performs the next frequency-axis (or time-axis) on the time-axis (or frequency-axis) This means a method of performing RE mapping for resources. At this time, the RE mapping order on the frequency axis (or time axis) resource follows the frequency axis index or a specific pattern.

  4] The values corresponding to N and M can be calculated in units of modulation symbols, not bits.

  5] Further, the data bits in the coded CB to be subjected to rate matching / puncturing for the purpose of UCI piggyback are the whole including the systematic and parity parts, or only the parity part excluding the systematic parts. Can be limited to

  FIG. 13 is a simplified illustration of a method of distributing UCI across coded CBs based on puncturing or rate matching (for data bits in the coded CB).

  Further, when a bit interleaver (per CB) (that is, interleaving of bits in a CB) is applied to each CB for a CB (code block) generated after a channel coding process, the UE: The UCI piggyback can be performed as follows.

  <1> When UE performs UCI piggyback, UE distributes encoded UCI bits (per CB) evenly to all CBs.

  <2> Rate matching for each CB is performed in accordance with the above-mentioned coded UCI bit (per CB)

  <3> After combining the above (rate-matched) CB with coded UCI bits (per CB), apply bit interleaver (per CB) to the combined coded bits

  <4> Modulate the above (interleaved) coded bits and map with the RE in the PUSCH. At this time, the RE mapping is the same as the data (eg, UL-SCH) RE mapping process in the PUSCH.

  Further, the following UCI mapping method can be considered as a method for dispersing the UCI-mapped REs on the frequency axis and the time axis.

  1> Method # 1: A method of mapping 4M REs to the first symbol (depending on the symbol order) and then moving to the next symbol for mapping

  A> The 4M RE indexes may be {0 + m, 3M + m, 6M + m, 9M + m} (where m = 0,..., M−1), and a specific (different) symbol for each symbol. An offset (eg, symbol index) can be added.

  i> Example: RE index in Symbol # A = {0 + m + A, 3M + m + A, 6M + m + A, 9M + m + A} or {0 + m + A * M, 3M + m + A * M, 6M + m + A * M, 9M + m + A * M}

  ii> Example: RE index in Symbol # A = {(0 + m + A) mod 12M, (3M + m + A) mod 12M, (6M + m + A) mod 12M, (9M + m + A) mod 12M} or {(0 + m + A * M + M12M) ) Mod 12M, (6M + m + A * M) mod 12M, (9M + m + A * M) mod 12M

  B> Of the above 4M RE indexes, the mapping for the first 4 REs (0M, 3M, 6M, 9M) (from the viewpoint of UCI RE mapping) follows the following order.

  i> 0M-> 3M-> 6M-> 9M

  ii> 0M → 6M → 3M → 9M

  iii> 0M-> 9M-> 3M-> 6M

  iv> 3M-> 9M-> 0M-> 6M

  v> 0M-> 9M-> 6M-> 3M

  C> Of the above 4M RE indexes, the mapping for the 4 + m, 5 + m, 6 + m, 7 + m (where m = 0, 1,..., M−1) four REs (from the viewpoint of UCI RE mapping) is as follows: Follow the order of

  i> 0M + m-> 3M + m-> 6M + m-> 9M + m

  ii> 0M + m-> 6M + m-> 3M + m-> 9M + m

  iii> 0M + m-> 9M + m-> 3M + m-> 6M + m

  iv> 3M + m-> 9M + m-> 0M + m-> 6M + m

  v> 0M + m-> 9M + m-> 6M + m-> 3M + m

  D> After mapping up to the last symbol, return to the first symbol and return to the other 4M RE indexes {0 + m, 3M + m, 6M + m, 9M + m} (where m = M,..., 2M−1). To perform the above-described mapping process.

  E> In the above configuration, M is the number of RBs allocated to the PUSCH and / or the number of symbols allocated to the PUSCH (excluding DMRS) and / or MCS (Modulation and Coding Scheme) and / or UCI specified by the PUSCH. It is determined by the number of coding bits and / or the number of UCI coding modulation symbols (RE). As an example, M is determined by the number of RBs allocated to the PUSCH.

  2> Method # 2: A method of mapping 12M REs to the first symbol (depending on the symbol order) and then moving to the next symbol for mapping

  A> The 12M RE indexes can be {0 + m, 3M + m, 6M + m, 9M + m} (where m = 0,..., 3M−1), and a specific (different) symbol for each symbol. An offset (eg, symbol index) can be added.

  i> RE index in Symbol #A = {(0 + m + A) mod 12M, (3M + m + A) mod 12M, (6M + m + A) mod 12M, (9M + m + A) mod 12M} or {(0 + m + A * M) mod 12M *, M (M + M) 12M, (6M + m + A * M) mod 12M, (9M + m + A * M) mod 12M

  B> Mapping of the first four REs (0, 3M, 6M, 9M) among the 12M RE indexes follows the following order.

  i> 0M-> 3M-> 6M-> 9M

  ii> 0M → 6M → 3M → 9M

  iii> 0M-> 9M-> 3M-> 6M

  iv> 3M-> 9M-> 0M-> 6M

  v> 0M-> 9M-> 6M-> 3M

  C> Of the 12M RE indexes, the mapping for the 4 + m, 4 + m, 5 + m, 6 + m, 7 + m (where m = 0, 1,..., 3M-1) four REs (from the viewpoint of UCI RE mapping) is as follows: Follow the order of

  i> 0M + m-> 3M + m-> 6M + m-> 9M + m

  ii> 0M + m-> 6M + m-> 3M + m-> 9M + m

  iii> 0M + m-> 9M + m-> 3M + m-> 6M + m

  iv> 3M + m-> 9M + m-> 0M + m-> 6M + m

  v> 0M + m-> 9M + m-> 6M + m-> 3M + m

  D> In the above configuration, M is the number of RBs allocated to PUSCH and / or the number of symbols allocated to PUSCH (excluding DMRS) and / or the number of MCS and / or UCI coded bits specified for PUSCH and / or Alternatively, it is determined by the number of UCI coding modulation symbols (RE). For example, the M may be determined by the number of RBs allocated to the PUSCH.

  3> Method # 3: A method in which P clusters (C_0, C_1, C_2,..., C_ (P−1)) are defined in the frequency axis direction, and UCI is RE-mapped for the P clusters as follows.

  A> Subcarrier index (local in PUSCH) corresponding to frequency axis cluster C_L (where L = 0, 1, 2,..., P−1) is defined as follows.

  i> C_L = {L * M + 0, L * M + 1,..., L * M + M-1}, L = 0, 1, 2,.

At this time, if (per symbol) total RE number of the PUSCH is _{M 0,} given the _{M =} M 0 / P. Further, the number P of clusters can be set by the base station.

  The RE mapping for the Q * P + kth (k = 0, 1,..., P-1, Q = 0, 1, 2, 3,...) Modulation symbol for B> UCI can be defined as follows.

  When i> P = 4

  For the sequence A, the (local in PUSCH) RE index in the cluster C_A [k] is A [k] * M + (Q mod M) (or (A [k] +1) * M− (Q mod M) − RE mapping is performed by the RE that is 1).

  However, the sequence A is any one of the following.

  A = [0 1 2 3]

  A = [0 2 1 3]

  A = [0 3 1 2]

  A = [1 3 0 2]

  A = [0 3 2 1]

  Here, A [k] means a value corresponding to the index k of the array A.

ii> P = 2 When ^N

  For the sequence A, the (local in PUSCH) RE index in the cluster C_A [k] is A [k] * M + (Q mod M) (or (A [k] +1) * M− (Q mod M) − RE mapping is performed by the RE that is 1).

Here, the array A is a bit reversal permutation sequence for ^2N .

  A [k] means a value corresponding to the index k of the array A.

  C> When UCI mapping is performed for all REs in one symbol (in the PUSCH), the RE mapping is performed for the next symbol.

  4> Method # 4: Define P clusters (C_0, C_1, C_2,..., C_ (P-1)) in the frequency axis direction and perform RE mapping of UCI for the P clusters as follows. method

  A> A (local in PUSCH) subcarrier index corresponding to the frequency axis cluster C_L (where L = 0, 1, 2,..., P−1) can be defined as follows.

  i> C_L = {L * M + 0, L * M + 1,..., L * M + M-1}, L = 0, 1, 2,.

At this time, if (per symbol) total RE number of the PUSCH is _{M 0,} given the _{M =} M 0 / P. However, P, which is the number of clusters, can be set by the base station.

  The RE mapping for the Q * P + Kth (k = 0, 1,..., P-1, Q = 0, 1, 2, 3,...) Modulation symbol for B> UCI can be defined as follows.

  When i> P = 4

  The following UCI mapping is performed on a symbol having V = Q mod N_SYMBOL as an index. At this time, the RE mapping is performed on the array A using the RE whose cluster (local in PUSCH) RE index in the cluster C_A [k] is A [k] * M + W (or A [k] * M−W + M−1).

  Here, N_SYMBOL means the total number of symbols for which UCI mapping is performed. Also, it means W = floor (Q / N_SYMVOL).

  However, the sequence A is any one of the following.

  A = [0 1 2 3]

  A = [0 2 1 3]

  A = [0 3 1 2]

  A = [1 3 0 2]

  A = [0 3 2 1]

  Here, A [k] means a value corresponding to the index k of the array A.

ii> P = 2 When ^N

  The following UCI mapping is performed on a symbol having V = Q mod N_SYMBOL as an index. At this time, the RE mapping is performed on the array A using the RE whose cluster (local in PUSCH) RE index in the cluster C_A [k] is A [k] * M + W (or A [k] * M−W + M−1).

  Here, N_SYMBOL means the total number of symbols for which UCI mapping is performed. Also, it means W = floor (Q / N_SYMVOL).

However, the array A can be a bit reversal permutation sequence for ^2N .

  A [k] means a value corresponding to the index k of the array A.

  5> Method # 5: Define P clusters (C_0, C_1, C_2,..., C_ (P-1)) in the frequency axis direction, and perform RE mapping of UCI to P clusters as follows. method

  A> The subcarrier included in each cluster is determined by any of the following methods.

  i> Option 1: Method promised in advance

  As an example, a (local in PUSCH) subcarrier index corresponding to the frequency axis cluster C_L (where L = 0, 1, 2,..., P−1) can be defined as follows.

  C_L = {L * M + 0, L * M + 1,..., L * M + M-1}, L = 0, 1, 2,.

Here, when total RE number (per symbol) in the PUSCH is _{M 0,} it may be given as _{M =} M 0 / P. Alternatively, M or P is a value set by the base station and / or a value determined by the number of UCI REs.

  ii> Option 2: The base station sets a subcarrier included in each cluster (by an upper layer signal or the like). At this time, P, which is the number of clusters, is set by the base station.

  B> The order of UCI mapping between clusters is determined by one of the following methods.

  i> Option 1: determined by specific sequence A

  As an example, the UCI mapping order between clusters is defined for the array A in the order of cluster C_A [0], cluster C_A [1],..., Cluster C_A [P-1].

  Here, A [k] means a value corresponding to the index k of the array A.

  Array A is as follows.

  When A> P = 4

  A = [0 1 2 3]

  A = [0 2 1 3]

  A = [0 3 1 2]

  A = [1 3 0 2]

  A = [0 3 2 1]

When B> P = ^2N

A can be a bit reversal permutation sequence for ^2N .

  ii> Option 2: According to the order set by the base station

  The order of UCI mapping between subcarriers in a C> cluster is determined by one of the following methods.

  i> Option 1: Ascending order of frequency index

  ii> Option 2: descending order of frequency index

  iii> Option 3: According to the order set by the base station

  As an example, Option 1 or Option 2 is applied depending on the position of the frequency axis resource of the cluster. Specifically, if the cluster is included in the left half frequency domain of the PUSCH resource (based on the ascending order of the frequency index), the cluster complies with Option 1, and if the cluster is included in the other half frequency domain, it complies with Option 2.

  The UCI mapping order between the sub-carriers in the cluster means an order in which UCI symbols that are sequentially modulated (subject to UCI mapping) for the corresponding C cluster are generated and fill the sub-carriers in the cluster.

  D> Thereafter, the terminal performs UCI mapping (cluster-based) in the following manner.

  i> UCI-modulated (within a specific symbol) UCI-mapping in a UCI mapping order between clusters for all P clusters. However, the UE can perform UCI mapping on one modulated UCI symbol for each cluster in each order.

  When UCI mapping is performed on ii> P * S (where S is a natural number) modulated UCI symbols, the UE can perform one of the following operations.

  1 >> Option1: If S is a specific value, move to the next symbol (from the viewpoint of UCI mapping) and perform (cluster-based) UCI mapping on the corresponding symbol. Alternatively, the UCI symbol re-modulated for the current symbol is subjected to UCI mapping for all P clusters in the UCI mapping order between clusters. At this time, if the UE performs UCI mapping for all symbols, the UE moves to the first symbol again and performs (cluster-based) UCI mapping for the corresponding symbol.

  2 >> Option 2: Perform UCI mapping on U-modulated UCI symbols in a total of P clusters in the UCI mapping order between clusters until the UCI mapping for all (frequency) resources in the current symbol is completed.

  iii> When performing the UCI mapping for the (specific) modulated UCI symbol in each cluster, the subcarrier position for the modulated UCI symbol is determined by the UCI mapping order between the subcarriers in the corresponding cluster. In other words, when there is a modulated UCI symbol that is generated sequentially for a specific cluster (to be subjected to UCI mapping), the position of the subcarrier on which the series of modulated UCI symbols is UCI-mapped is determined between the subcarriers in the corresponding cluster. Follow the UCI mapping order.

  FIG. 14 is a diagram simply showing a UCI mapping method according to method # 1 for the three symbols on the front side. In FIG. 14, it is assumed that the order of 0-> 9M-> 3M-> 6M applies to the first four REs.

  In FIG. 14, the numbers indicate the UCI RE mapping order, the shaded area indicates the UCI, the area where no shading is applied indicates data, and the subcarrier (or frequency) index is lower in the figure. The symbol (or time index) increases toward the right in the figure.

  FIG. 15 is a diagram simply showing an example of the UCI mapping method by the method # 5.

  As shown in FIG. 15, when the number of clusters is four, the UE performs UCI mapping between clusters in the order of [cluster 0 → cluster 1 → cluster 2 → cluster 3], and subcarriers in the cluster. Can be performed in ascending order of frequency index. Also, the UE may perform UCI mapping for the next symbol after finishing UCI mapping for all (available) frequency resources in one symbol.

  FIG. 16 is a diagram simply showing another example of the UCI mapping method by the method # 5.

  As shown in FIG. 16, when the number of clusters is four, the UE performs UCI mapping between clusters in the order of [cluster 0 → cluster 3 → cluster 2 → cluster 1], and subcarriers in the cluster. Can be performed in ascending order of frequency index. Also, the UE may perform UCI mapping for the next symbol after finishing UCI mapping for all (available) frequency resources in one symbol.

  FIG. 17 is a diagram simply showing still another example of the UCI mapping method by the method # 5.

  As shown in FIG. 17, when the number of clusters is four, the UE performs UCI mapping between the clusters in the order of [cluster 0 → cluster 1 → cluster 2 → cluster 3], and subcarriers within the cluster. Can be performed in ascending order of frequency index. Also, the UE may perform UCI mapping on all clusters in one symbol (for four UCI REs) uniformly, and then perform UCI mapping on the next symbol.

In the following description, a RE mapping rule for a specific UCI means a position and an allocation order of REs to which coding bits (or coding symbols) for the UCI are allocated. If RE of _{k 1} th allocation order according to RE mapping rule for UCI is not available, UE is the following allocation order of RE mapping process on the coded bits for UCI skip the appropriate RE (or coding symbols) RE ( Example: Resume from k ₁ +1).

  Hereinafter, the (frequency axis) cluster means a set composed of (adjacent) specific subcarriers. Also, a resource element (RE) means a physical (time / frequency) resource corresponding to one (OFDM) symbol and one subcarrier in the OFDM structure.

  When a UE according to the present invention transmits a (specific) UCI on the PUSCH (eg, UCI piggyback or UCI on PUSCH), (for the UCI) a cluster-based (frequency-based) RE mapping rule as follows: (Hereinafter referred to as UCI mapping method # 6).

  1]] Set P clusters (separated by frequency axis) from UE

  A]] At this time, the subcarrier included in each cluster is determined by one of the following methods.

  i]] Option 1: Pre-promised scheme (between terminal and base station)

  As an example, for the P clusters, the subcarrier index included in the L {0, 1, 2,..., P-1} th cluster (eg, C_L) is a local subcarrier index (Local subcarrier) in the PUSCH. index) is defined as follows.

  C_L = {L * M + 0, L * M + 1,..., L * M + M-1}, L = 0, 1, 2,.

Here, when (per symbol) total RE number of the PUSCH is _{M 0,} given the _{M =} M 0 / P. M or P is a value set by the base station and / or a value determined by the number of UCI REs.

  ii]] Option 2: The base station sets any one or more of the following information (for example, by an upper layer signal), and the UE recognizes the set cluster based on the information.

  1. Number of clusters

  2. (Frequency axis) starting point (or subcarrier index) for each cluster

  3. (Frequency axis) end point (or subcarrier index) for each cluster

  4. Resource (or subcarrier index) included for each cluster (frequency axis)

  5. RE (or subcarrier) resource information excluded for each cluster (when UCI mapped)

  B]] Here, when setting subcarrier indices constituting a cluster for each symbol (for UCI mapping), the UE further sets a different frequency axis offset for each (UCI mapping) symbol in the reference cluster (setting). It can be applied to derive clusters for each symbol.

  As an example, in the above example, assuming that Option 1 is applied,

  For P clusters of the k-th (UCI mapping target) symbol, the subcarrier index included in the L {0, 1, 2,..., P-1} -th cluster (eg, C_L) is PUSCH Can be defined as follows based on the local subcarrier index within

A. C_L = {(L * M + 0 + k) mod M ₀ , (L * M + 1 + k) mod M ₀ ,..., (L * M + M−1 + k) mod M ₀ }, L = 0, 1, 2,.

B. C_L = {(L * M + 0−k) mod M ₀ , (L * M + 1−k) mod M ₀ ,..., (L * M + M−1−k) mod M ₀ }, L = 0, 1, 2,. , P-1

Here, when (per symbol) total RE number of the PUSCH is _{M 0,} given the _{M =} M 0 / P. M or P is a value set by the base station and / or a value determined by the number of UCI REs.

  2]] Definition of UCI mapping order among the P clusters set above

  A]] The UCI mapping order between clusters is determined by one of the following methods.

i]] The P clusters can be indexed in ascending (or descending) order on the frequency axis. That is, any subcarrier of the _first cluster L is, L 2 _(> L ₁₎ -th always early or always late in the frequency axis than any subcarrier in the cluster.

  ii]] Option 1: UCI mapping order between clusters depends on specific sequence A

  For the array A, the UCI mapping order between the clusters is defined in the order of A [0] th cluster, A [1] th cluster,..., A [P-1] th cluster.

  At this time, the sequence A is one of the following.

  A]] When P = 4

  1. A = [0 1 2 3]

  2. A = [0 2 1 3]

  3. A = [0 3 1 2]

  4. A = [1 3 0 2]

  5. A = [0 3 2 1]

B]] When P = ^2N

A is a bit reversal permutation sequence for 2 ^N

  C]] When P = 2Q

  1. A = [0 P-11 P-2 2 P-3 ... kP- (k + 1) ... Q-1 PQ]

  2. A = [P-10 P-21 P-3 2 ... P- (k + 1) k ... PQ Q-1]

  iii] Option 2: The order of UCI mapping between clusters depends on the order set by the base station (via higher layer signals).

  3]] Definition of UCI mapping order (between sub-carriers) within a cluster

  A]] When coded UCI bits (or coded UCI symbols) for performing UCI mapping on the corresponding cluster occur, the UCI mapping order between subcarriers in the cluster is determined by the coded UCI bits (or coded UCI symbols). ) Means the order that satisfies the subcarriers in the cluster.

  B]] At this time, the frequency index of the first subcarrier starting the UCI mapping in the cluster differs for each symbol. As an example, as the time index for a symbol increases, the first subcarrier index that starts UCI mapping in a cluster increases (or decreases) proportionately (provided that the last subcarrier index is the total subcarrier index in the cluster). It can be derived by applying a modulo operation to the number of carriers.)

  C]] The UCI mapping order among the subcarriers in the cluster is determined by one of the following methods.

  i]] Option 1: Ascending order of frequency index

  As an example, when a cluster is composed of M subcarriers, UCI mapping is performed on the (k + 1) mod Mth frequency index after UCI mapping on the kth frequency index.

  ii]] Option 2: descending order of frequency index

  As an example, when a cluster is composed of M subcarriers, UCI mapping is performed on (k-1) mod Mth frequency index after UCI mapping on kth frequency index.

  iii] Option 3: According to the order set by the base station (by upper layer signals)

  iv] The order of UCI mapping between subcarriers in a cluster differs depending on the UCI type. As an example, in HARQ-ACK, the UCI mapping order between the subcarriers in the cluster follows the ascending (or descending) order of the frequency index, and the UCI mapping order between the subcarriers in the cluster in the CSI shows the descending order of the frequency index (or In ascending order). (Example: To prevent the case where CSI is punctured by HARQ-ACK)

  4]] Perform cluster-based UCI mapping for multiple symbols

  A]] The UE can perform (cluster-based) UCI mapping from the first symbol (in terms of UCI mapping) in the following manner.

  i]] Step 1: UCI mapping of coded UCI bits (or coded UCI symbols) (within a symbol) is performed on all P clusters according to the UCI mapping order between clusters.

  Here, the UE performs UCI mapping on X (eg, X = 1) REs for each ordered cluster.

  Also, when coded UCI bits (or coded UCI symbols) in each cluster are generated (in order), the UCI mapping for coded UCI bits (or coded symbols) is Follow the UCI mapping order between carriers. As an example, the Nth coded UCI bit (or coded UCI symbol) allocated from the viewpoint of a specific cluster is allocated to a subcarrier having the Nth allocation order in the UCI mapping order among the subcarriers in the corresponding cluster. Can be

  If there is no UCI-assigned subcarrier in a particular cluster, the UE can move to the next cluster (from a UCI mapping perspective) and perform UCI mapping.

  Also, when a phase tracking reference signal (PT-RS) is set for a specific RE (or subcarrier) to be mapped to UCI, the UE skips UCI mapping in the RE and assigns UCI to the next RE to be mapped to UCI. be able to.

  ii] Step 2: When the UE has performed Step 1 (for one symbol) S times, move to the next symbol (from the viewpoint of UCI mapping) and perform Step 1.

  At this time, S is the number of times that Step 1 is performed once or until UCI mapping is performed on all available frequency resources (within one symbol).

  Alternatively, when the UE has performed Step 1 (with an equal number of times) for all symbols (for UCI mapping), the UE can apply one of the following methods.

  1. Option 1: Step 1 can be performed again from the first symbol (in terms of UCI mapping). (That is, the order between the symbols subject to UCI mapping is maintained.)

  2. Option 2: Step 1 can be performed in reverse from the last symbol (from the viewpoint of UCI mapping). (That is, the order between UCI mapping target symbols is changed.)

  FIG. 18 is a diagram simply showing an example of the UCI mapping method by the method # 6.

  As illustrated in FIG. 18, when the number of clusters is four, the UE performs UCI mapping between clusters in the order of [cluster 0 → cluster 1 → cluster 2 → cluster 3], and performs HARQ-ACK on ( UCI mapping between subcarriers (within a cluster) may be performed in ascending frequency index order, and UCI mapping between subcarriers (within a cluster) for CSI may be performed in descending frequency index order. At this time, one UCI RE is assigned to each cluster once (eg, X = 1), and the number of cluster-based UCI mappings (for one symbol) is one (eg, S = 1), All the symbols in the PUSCH are the targets of the UCI mapping, and the UCI mapping order between the symbols can be set in ascending order (or descending order) of the time index. In this configuration, when HARQ-ACK punctures the RE in the PUSCH, when the HARQ-ACK mapping RE and the CSI mapping RE overlap, the UE punctures the CSI at the corresponding RE position and maps the RE for the HARQ-ACK. it can.

  FIG. 19 is a diagram simply showing another example of the UCI mapping method by the method # 6.

  As shown in FIG. 19, as a modification of FIG. 18, when the UE performs UCI mapping between symbols, UCI mapping including HARQ-ACK and CSI alternately for each hop around a frequency hopping boundary of PUSCH. It can be performed. The method of alternately performing UCI mapping for each hop centering on the frequency hopping boundary as described above can be applied when frequency hopping is applied to the PUSCH or when there is further a DM-RS in the PUSCH.

  FIG. 20 is a diagram simply showing still another example of the UCI mapping method by the method # 6.

  As shown in FIG. 20, when the number of clusters is four, the UE performs UCI mapping between the clusters in the order of [cluster 0-> cluster 3-> cluster 1-> cluster 2], and performs HARQ-ACK on ( UCI mapping between subcarriers (within a cluster) may be performed in ascending frequency index order, and UCI mapping between subcarriers (within a cluster) for CSI may be performed in descending frequency index order. At this time, one UCI RE is assigned to each cluster once (eg, X = 1), and the number of cluster-based UCI mappings (for one symbol) is one (eg, S = 1), All the symbols in the PUSCH are the targets of the UCI mapping, and the UCI mapping order between the symbols can be set in ascending order (or descending order) of the time index. In this configuration, when HARQ-ACK punctures the RE in the PUSCH, when the HARQ-ACK mapping RE and the CSI mapping RE overlap, the UE punctures the CSI at the corresponding RE position and maps the RE for the HARQ-ACK. it can.

  FIG. 21 is a diagram schematically illustrating still another example of the UCI mapping method according to the method # 6.

  As shown in FIG. 21, as a modification of FIG. 20, when the UE performs UCI mapping between symbols, UCI mapping including HARQ-ACK and CSI alternately for each hop around the frequency hopping boundary of PUSCH. It can be performed. Such a method of alternately performing UCI mapping for each hop centering on a frequency hopping boundary can be applied when frequency hopping is applied to the PUSCH or when there is further a DM-RS in the PUSCH.

  FIG. 22 is a diagram schematically illustrating still another example of the UCI mapping method according to the method # 6.

  As illustrated in FIG. 22, when the number of clusters is four, the UE performs UCI mapping between the clusters in the order of [cluster 0 → cluster 1 → cluster 2 → cluster 3] and performs HARQ-ACK on ( UCI mapping between sub-carriers (within a cluster) may be performed in ascending frequency index order, and UCI mapping between sub-carriers (within a cluster) for CSI may be performed in descending frequency index order. At this time, one UCI RE is assigned to each cluster once (eg, X = 1), and the number of cluster-based UCI mappings (for one symbol) is one (eg, S = 1), All the symbols in the PUSCH are the targets of the UCI mapping, and the UCI mapping order between the symbols can be set in ascending order (or descending order) of the time index. For the cluster (for each symbol) for UCI mapping, a frequency axis offset proportional to the time index of the symbol (for UCI mapping) can be applied to the reference cluster (setting). In this configuration, when HARQ-ACK punctures the RE in the PUSCH, when the HARQ-ACK mapping RE and the CSI mapping RE overlap, the UE punctures the CSI at the corresponding RE position and maps the RE for the HARQ-ACK. it can. At this time, each (symbol) cluster for UCI mapping is shifted by one subcarrier as the number of symbols increases (however, a modulo operation is applied to all the numbers of subcarriers in the PUSCH).

  FIG. 23 is a diagram simply showing still another example of the UCI mapping method by the method # 6.

  As shown in FIG. 23, as a modification of FIG. 22, when the UE performs UCI mapping between symbols, UCI mapping including HARQ-ACK and CSI alternately for each hop centering on the PUSCH frequency hopping boundary. It can be performed. Such a method of alternately performing UCI mapping for each hop centering on a frequency hopping boundary can be applied when frequency hopping is applied to the PUSCH or when there is further a DM-RS in the PUSCH.

  Further, in the present invention, the following UCI mapping method is applied.

  {1} First alternative (Alt1)

  A. Step 0: Generation of coded CB (CB1) (having systematic bits and parity bits)

  B. Step 1: After performing rate matching or puncturing on parity bits in the encoded CB (CB1), an encoded UCI bit is added to generate an encoded CB (CB2). Here, the UE performs rate matching or puncturing on consecutive bits from the last parity bit, and performs rate matching or puncturing evenly on a plurality of parity bits.

  C. Step 2: Inter-leaving (Intra-CB interleaving per / cross branch) within the CB for each branch or across the branch to the coded CB (CB2) to generate a (bit-level interleaved) coded CB (CB3). Here, when there are a plurality of parity bit groups in the CB, the UE performs (bit-level) interleaving for each parity bit group, and then performs (bit-level) interleaving between the parity bit groups. Can be.

  D. Step 3: Perform frequency-priority (or time-priority) RE mapping (by CB index) (for CB3)

  {2} Second alternative (Alt2)

  A. Step 0: Generation of coded CB (CB1) (having systematic bits and parity bits)

  B. Step 1: Perform interleaving (Intra-CB interleaving per / cross branch) in each CB of the coded CB (CB1) or across the CB to generate a (bit-level interleaved) coded CB (CB2). Here, when a plurality of parity bit groups exist in the CB, the UE performs (bit-level) interleaving for each parity bit group, and then performs (bit-level) interleaving between the parity bit groups. Can be.

  C. Step 2: After performing rate matching or puncturing on parity bits in the coded CB (CB2), a coded CB (CB3) is generated by adding coded UCI bits. Here, the UE can perform rate matching or puncturing on bits consecutive from the last parity bit, and can perform rate matching or puncturing on a plurality of parity bits equally.

  D. Step 3: Perform frequency-priority (or time-priority) RE mapping (by CB index) (for CB3)

  {3} Third alternative (Alt3)

  A. Step 0: Generation of coded CB (CB1) (having systematic bits and parity bits)

  B. Step 1: Perform interleaving (Intra-CB interleaving per / cross branch) in each CB of the coded CB (CB1) or across the CB to generate a (bit-level interleaved) coded CB (CB2). Here, when a plurality of parity bit groups exist in the CB, the UE performs (bit-level) interleaving for each parity bit group, and then performs (bit-level) interleaving between the parity bit groups. Can be.

  C. Step 2: After performing rate matching or puncturing on parity bits in the coded CB (CB2), a coded CB (CB3) is generated by adding coded UCI bits. Here, the UE can perform rate matching or puncturing on bits consecutive from the last parity bit, and can perform rate matching or puncturing on a plurality of parity bits equally.

  D. Step 3: Inter-leaving (Intra-CB interleaving per / cross branch) in the CB for each branch or across the CB for the coded CB (CB3) to generate a (bit-level interleaved) coded CB (CB4). Here, when a plurality of parity bit groups exist in the CB, the UE performs (bit-level) interleaving for each parity bit group, and then performs (bit-level) interleaving between the parity bit groups. Can be.

  E. FIG. Step 4: Perform frequency-priority (or time-priority) RE mapping (by CB index) (for the above CB4)

  Further, the UE can perform the UCI mapping in the following manner.

  1 After rate matching or puncturing (for data) at the front end of RE mapping, data and UCI are concatenated, and then a frequency-priority (or time-priority) scheme is applied to the entire (combined) encoded bits. Perform RE mapping with

  A. In this process, rate matching (for data) or puncturing is performed at the front end or the rear end of the interleaving.

  B. This process is performed for each CB. Assuming a total of M CBs and a total of N bits of UCI, the UE may perform rate matching or puncturing (for data) for each CB and then add N / M bits of UCI.

  After performing rate matching or puncturing (with respect to data) at the stage after 2｝ RE mapping, RE mapping is performed for UCI by a method different from data.

  A. The UE performs the above process basically based on the frequency priority method. In performing the above process, the UE performs the RE mapping in a distributed (distributed) order instead of a simple RE index order within a symbol (or CB).

  B. In the above configuration, when assuming a total of M CBs and a total of N bits of UCI, the rate matching or puncturing (for data) corresponding to the N / M bits of UCI for each CB is performed by the above-described RE. Can be applied by mapping.

  Further, when the UE applies rate matching (or puncturing) in consideration of coded bits for UCI (hereinafter, coded UCI bits) in the process of generating coded bits for data (hereinafter, coded data bits), After combining the coded UCI bits and the coded data bits, the UE may apply a (single) RE mapping to the combined coded bits. At this time, the RE mapping order is the order of the encoded UCI bit → the encoded data bit.

  Here, when the modulation order supports the size of K bits, the length of the coded UCI bits and / or the coded data bits is limited to have a bit size represented by a multiple of K. With such a configuration, data and UCI are separated in RE units, and additional power allocation for UCI transmission REs is applied.

  In the present invention, the (single) RE mapping method differs according to the waveform (Waveform) for PUSCH transmission as follows (or the following RE mapping method is applied only to the encoded UCI bits).

  1｝｝ PUSCH waveform (waveform) is DFT-s-OFDM

  A. Frequency priority mapping

  As an example, the RE mapping is performed on the coded bits while increasing the subcarrier (or frequency) index starting from the minimum value of the symbol (or time) index and the minimum value of the subcarrier (or frequency) index. Thereafter, when the subcarrier (or frequency) index for the specific symbol (or time) index reaches the maximum value, the symbol (or time) index is increased by one, and the subcarrier (or frequency) index is again reduced from the minimum value of the subcarrier (or frequency) index. The RE mapping is performed on the coded bits while increasing the (or frequency) index.

  B. Time-first mapping

  As an example, starting from the minimum value of the symbol (or time) index and the minimum value of the subcarrier (or frequency) index, RE mapping is performed on the coded bits while increasing the symbol (or time) index. Thereafter, when the symbol (or time) index for a specific subcarrier (or frequency) index reaches the maximum value, the subcarrier (or frequency) index is incremented by one, and the symbol (or time) index is again reduced from the symbol (or time) index. Or, the RE mapping is performed on the coded bits while increasing the index.

  C. When the PUSCH waveform is DFT-s-OFDM, one of the frequency-first mapping scheme and the time-first mapping scheme is set in advance, or the base station can set the upper-layer signal.

  2 When PUSCH waveform is CP-OFDM

  A. Frequency priority mapping

  After assigning coded bits to all frequency resources (assigned to PUSCH resources) in one symbol in symbol order, coded bits are assigned to frequency resources (assigned to PUSCH resources) for the next symbol Assign.

  B. Interleaving per symbol

  A method of allocating (encoding bits) in the order in which a local index (Local index) for a subcarrier is interleaved by a specific method without being allocated in the order of the subcarrier (or frequency) index in each symbol (or time) index

  For example, when the number of all allocated subcarriers in a symbol is N, the interleaving for each symbol is performed by using a block interleaver (to which column-wise permutation is applied) for the subcarrier for each symbol. Block interleaver) is applied as follows.

  1. Input (Row by Row) 0 to (N-1) for each row of the P × Q matrix

  A. In each column (Row), interleaving is applied in an order in which a column index (Column index) increases.

  B. P and Q are values promised in advance, values set by the base station, or values determined by the number of PRBs allocated to PUSCH resources, and have a relationship of P * Q = N.

  2. Apply column-wise permutation to the above matrix

  A. When Q = 4, Column-wise permutation may be [1 2 3 4]-> [1 3 2 4]. The number k in parentheses indicates the k-th column.

  B. If Q = 6, the Column-wise permutation can be [1 2 3 4 5 6]-> [1 3 4 2 4 6]. The number k in parentheses indicates the k-th column.

C. If a ^{Q = 2 k, Column-wise} permutation can follow the bit inversion permutation (bit reversal permutation).

  3. Output while reading out each element of this matrix for each column (Column by Column)

  A. Interleaving is applied to each column in the order of increasing row index

  B. The RE mapping is performed on bits coded in the order of subcarriers having a local index (in a symbol) corresponding to the output.

  As an example, if the PUSCH is one RB (eg, N = 12) and Q = 4, P = 12 / Q = 3. At this time, the UE can input 1 to 12 in a 3 × 4 matrix as Row by Row as shown in the following table.

  Here, if Column-wise permutation is applied as in [1 2 3 4] → [1 3 2 4], the UE can obtain the following matrix.

  Thereafter, when the UE generates an output value while reading each element in the Column by Column, the output value is {Output = 1, 5, 9, 3, 7, 11, 2, 6, 10, 4, 8, 12}. become that way. At this time, if each number k represents a k-th subcarrier (of the allocated subcarriers in the symbol), the output value can be interpreted as the following RE mapping. However, in the following examples, it is assumed that the numbers mean the RE mapping order, the subcarrier (or frequency) index increases toward the lower side, and the symbol (or time) index increases toward the right side.

  This RE mapping order represents the order within one symbol. Therefore, the UE performs frequency-priority mapping for RE mapping for a plurality of symbols (eg, performs RE mapping on coded bits corresponding to frequency resources in one symbol, and performs RE mapping on coded bits for the next symbol. Do). As an example, when the number of symbols is 10, the RE mapping order of the UE is defined as in the following table. However, in the following examples, the numbers indicate the RE mapping order, the subcarrier (or frequency) index increases toward the lower side, and the symbol (or time) index increases toward the right side.

  FIG. 24 is a diagram simply showing an example in which the coded UCI bits are earlier in the RE mapping order than the coded data bits.

  In FIG. 24, it is assumed that UCI has coded bits corresponding to 20 REs, and that the coded UCI bits have a RE mapping order earlier than the coded data bits.

  At this time, the RE mapping for UCI is naturally distributed on the frequency axis as shown in the following table. In the following table, the numbers indicate the RE mapping order, the subcarrier (or frequency) index increases toward the lower side, and the symbol (or time) index increases toward the right side. The shaded area means UCI, and the area without negative means data.

  FIG. 25 is a diagram simply showing another example in which the coded UCI bits are earlier in the RE mapping order than the coded data bits.

  In FIG. 25, it is assumed that the UCI has coded bits corresponding to 20 REs, and the coded bits corresponding to 10 REs are distributed for two CBs.

  At this time, the RE mapping for UCI is naturally distributed on the frequency axis as shown in the following table. In the following table, the numbers indicate the RE mapping order, the subcarrier (or frequency) index increases toward the lower side, and the symbol (or time) index increases toward the right side. The shaded area means UCI, and the area without shade means data. It is also assumed that UCI1 + CB1 is mapped to the 1st to 42nd REs, and that UCI2 + CB2 is mapped to the 43rd to 84th REs.

Further, it is assumed that the UE performs RE mapping of coded bits to UCI in a specific symbol (in other words, Coded UCI bits to RE mapping). At this time, the number of all assigned subcarriers in the corresponding symbol is N, and the assigned subcarriers are in a local index (Local) from 0 to (N−1) (in ascending or descending order of frequency index). If the index) is assigned, the UE following sequence _{a n} (where, n = 0, 1, ..., is possible to RE mapping for UCI bits encoded in the local index order corresponding to n-1) Yes (ie, an _denotes the local index of the RE that performs n-th UCI mapping).

At this time, M is a divisor of N and a value of 2 n (or the maximum value of such values). M is determined by the number of PRBs allocated to the PUSCH or by a value set by the base station. In this case, UE is made to one (assigned to PUSCH resources) entire frequency resources in the symbols into the symbol sequence, the method (i.e., RE mapping according to _{a n)} of the RE mapping coded UCI bits as After that, RE mapping of the coded UCI bits can be performed on the frequency resource (assigned to the PUSCH resource) for the next symbol.

As an example, a M = 4, if it is N = 12, _{b n} and _{a n} is obtained as follows.

In this case, RE mapping order for UCI in one symbol may follow the local index sequence corresponding to sequence a _n as in the following table. However, in the following example, it is assumed that the subcarrier (or frequency) index increases toward the lower side and the symbol (or time) index increases toward the right side. At this time, the white numbers in the black shading on the left indicate the local index order between the subcarriers, and the black numbers in the white area on the right indicate the RE mapping order for UCI.

  Further, it is assumed that the UE performs RE mapping of coded bits to UCI in a specific symbol (in other words, Coded UCI bits to RE mapping). At this time, the total number of allocated subcarriers in the corresponding symbol is N, and a local index from 0 to (N−1) is allocated to the allocated subcarriers (in ascending order (or descending order) of frequency index). In this case, the UE can define a mapping pattern based on the number of REs (hereinafter, UCI REs) performing UCI mapping (for the corresponding symbols).

For example, the UE may set the number M of clusters on the frequency axis for UCI mapping according to the number of UCI REs (for the corresponding symbol) (where M is a divisor of N). At this time, the UE can perform RE mapping on the UCI bits encoded in the order of the local index corresponding to the following sequence c _n (where n = 0, 1,..., N−1) (ie, c _n means the local index of the RE that performs n-th UCI mapping).

(Where, n = 0,1, ..., N -1) The following sequence _{a n} can perform RE mapping for UCI bits encoded in the local index order corresponding to (i.e., _{a n} is the n th It means the local index of the RE that performs UCI mapping).

  As an example, when the UCI RE number (for the corresponding symbol) is R, M can be defined as: Here, K is a value promised in advance or a value set by the base station. Or, in general, the M value is determined by a specific numerical value and the number of UCI REs set by the base station or set by the base station.

In this case, UE went to RE mapping on the coded UCI bits as in one symbol in the symbol sequence (assigned to PUSCH resources) the method (i.e., RE mapping according to c _n) for the entire frequency resources Later, RE mapping of the encoded UCI bits may be performed on the frequency resources (assigned to PUSCH resources) for the next symbol.

As an example, a M = 4, if it is N = 12, _{c n} is determined as follows.

In this case, RE mapping order for UCI in one symbol may follow the local index order corresponding to the sequence c _n as shown in the following table. However, in the following example, it is assumed that the subcarrier (or frequency) index increases toward the lower side and the symbol (or time) index increases toward the right side. At this time, the white numbers in the black shading on the left indicate the local index order between the subcarriers, and the black numbers in the white on the right indicate the RE mapping order for UCI.

  FIG. 26 is a diagram illustrating an example of a UCI RE mapping method according to the present invention.

  As shown in FIG. 26, in the UCI RE mapping method, after the UE sequentially fills the REs at both ends of the (available) frequency resource of the first symbol, the UE moves to the next symbol and again (available). A method of sequentially satisfying REs at both ends of the frequency resource can also be considered. When the UE performs this operation up to the last symbol, the UE returns to the first symbol again to fill the REs at both ends of the (available) frequency resource in order, and then performs UCI mapping while moving to the next symbol. to continue.

  FIG. 26 briefly shows the UCI mapping operation of the UE when the UE performs UCI mapping on two (consecutive) symbols. In FIG. 26, a black area indicates a RE to which UCI mapping is performed, and a number indicates an RE mapping order. At this time, the position of the symbol to be subjected to the UCI RE mapping and the position of the subcarrier to be subjected to the UCI RE mapping for each symbol can be preset or promised by the base station. For reference, FIG. 26 assumes a case where UCI mapping is possible for all subcarriers in two (continuous) symbols.

  In the above description, in the UCI mapping of the UE, when the k-th UCI mapping RE collides with a specific RS transmission (eg, PT-RS: phase tracking-reference signal, RS for phase transition correction, etc.), The corresponding RE is skipped, and the UCI mapping is restarted from the (k + 1) th UCI mapping RE.

  The first UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.2. Second UCI transmission method

  When the UE performs UCI piggybacking on the PUSCH, the UE may perform resource mapping on coded UCI symbols (eg, modulated symbols) after resource mapping on data is completed, as follows.

  (1) The base station determines a plurality of symbols (or symbol sets) for UCI mapping (per subcarrier or subcarrier set) and a UCI mapping order among the symbols (or symbol sets) in one of the following methods. Set on device

  A. Promised method

  B. Set by upper layer signal (eg, RRC signaling)

  C. Set by dynamic control signal (eg DCI)

  D. Candidate value is set by upper layer signal and set by dynamic control signal (eg DCI)

  (2) UCI mapping between multiple sub-carriers (or sub-carrier sets) and sub-carriers (or sub-carrier sets) for UCI mapping (per symbol or symbol set) in one of the following ways: Set order on terminal

  A. Promised method

  B. Set by upper layer signal (eg, RRC signaling)

  C. Set by dynamic control signal (eg DCI)

  D. Candidate value is set by upper layer signal and set by dynamic control signal (eg DCI)

  (3) The terminal performs UCI mapping in the PUSCH resource area by one of the following methods.

  A. Frequency priority mapping method

  The UE performs frequency-priority UCI mapping for each symbol (or symbol set) in the UCI mapping order between the symbols (or symbol sets) as follows. At this time, the UE performs a UCI mapping order between subcarriers (or subcarrier sets) for REs corresponding to a plurality of subcarriers (or subcarrier sets) for UCI mapping (within a specific symbol or symbol set). , The coded UCI symbols are sequentially allocated.

  B. Time-first mapping method

  The UE performs time-priority UCI mapping for each sub-carrier (or sub-carrier set) in the UCI mapping order between the sub-carriers (or sub-carrier sets) as follows. At this time, the UE performs coding on the RE corresponding to a plurality of symbols (or symbol sets) for UCI mapping (within a specific subcarrier or subcarrier set) according to the UCI mapping order between symbols (or symbol sets). Are assigned in order.

  Here, symbols (or symbol sets) for UCI mapping, subcarriers (or subcarrier sets), UCI mapping order between symbols (or symbol sets), and UCI mapping order between subcarriers (or subcarrier sets) are defined as When configured by the base station, a particular symbol resource or subcarrier resource is defined in terms of an index.

  Also, the UE punctures part of the data RE and performs UCI mapping on the corresponding RE, or applies rate matching on part of the data RE and performs UCI mapping on the remaining REs in the PUSCH. It can be carried out.

  Also, when the waveform for PUSCH transmission is SC-FDMA, the UE UCI mapping operation can be performed in a virtual time and frequency domain before DFT precoding is applied.

  Whether the terminal applies the frequency priority mapping method or the time priority mapping method is determined by one of the following methods.

  1) Promised method

  2) Set by base station using upper layer signal

  3) Determined by the waveform applied to the PUSCH (eg, frequency-first mapping in the case of the OFDM system, time-first mapping (on a virtual time axis) in the case of the SC-FDMA system)

  At this time, when frequency-first mapping (or time-first mapping) is performed in symbol set (or sub-carrier set) units, the UCI mapping order between sub-carriers to be UCI-mapped in the symbol set (or sub-carrier set) is as follows: Time-first mapping (or frequency-first mapping) can be followed. For example, if the UCI mapping method applied to the symbol set unit is frequency-first mapping, the UE can apply a time-first mapping scheme within the symbol set. Similarly, if the UCI mapping method applied to the sub-carrier set unit is time-first mapping, the UE can apply the frequency-first mapping scheme within the symbol set.

  For example, the UE may puncture some data REs in the PUSCH after the data modulation and the resource mapping are completed, and perform coded UCI symbol (eg, modulated symbol) mapping on the corresponding REs. Alternatively, after performing rate matching on data and leaving some REs in the PUSCH, UCI symbol mapping coded on the corresponding REs may be performed.

  At this time, if the PUSCH transmission waveform is of the CP-OFDM scheme, the UE can apply UCI mapping of a frequency priority scheme in which UCI is first allocated to the frequency axis in order to obtain frequency diversity gain.

  For example, in a state where a REG is formed by the M REs dispersed on the same symbol, the UE sets the UCI (REGRS adjacent to the DMRS) to the REG index 1 of the first symbol, the REG index 1 of the next second symbol,. Symbol REG index 1 can be mapped to REG index 2 of the first symbol again. For locations between REGs in the same symbol, they can be in adjacent (in the frequency axis) or distributed form.

  FIG. 27 is a diagram simply showing a UCI mapping method when two REs having two subcarrier intervals are set as one REG. In particular, in FIG. 27, it is assumed that the interval between REs constituting the REG (or the interval between the first RE and the last RE in the REG) is smaller than the interval between the start points of the REGs.

  FIG. 28 is a diagram simply showing a UCI mapping method when two REs having two symbol intervals are set as one REG. FIG. 28 is a modified example of FIG. 27, and is an example in which REG is defined in the time axis direction.

  At this time, the UE sets the UCI to REG index1 of the first subcarrier (adjacent to the DMRS), REG index1 of the next second subcarrier, REG index1 of the last subcarrier, and REG index2 of the first subcarrier again. Can be mapped. In the case of a position between REGs in this same sub-carrier, they are either adjacent (in time axis) or dispersed.

  FIG. 29 is a diagram simply showing a UCI mapping method when two REs having five subcarrier intervals are set as one REG.

  As shown in FIG. 29, in a state where the REG is formed by the M REs dispersed on the same symbol, the UE sets the UCI to the REG index1 of the first symbol (adjacent to the DMRS) and the REG index1 of the next symbol. REG index1,... Can be mapped to REG index1 of the last symbol, and REG index2 of the first symbol again. At this time, an interval between REs constituting the REG (or an interval between the first RE and the last RE in the REG) may be set to be larger than an interval between start points of the REGs.

  In FIG. 29, the interval between REs in the REG is five subcarrier intervals, but the interval between the start points of the REGs can be set by two subcarriers. Therefore, the UCI can be mapped to REs belonging to REGs different from each other on the frequency axis.

  As shown in FIG. 29, when the interval between the REs constituting the REG (or the interval between the first RE and the last RE in the REG) is set to be larger than the interval between the starting points of the REGs, In addition, the distance between REs in the REG is set to be large as well as the distance between the REs in the REG so that adjacent information in the encoded UCI bits can be dispersed in the UCI mapping process.

  FIG. 30 is a diagram simply showing a UCI mapping method when two REs having four symbol intervals are set as one REG.

  As in the example of FIG. 29, in a state in which the REG is formed by the M REs dispersed on the same subcarrier, the UE sets the UCI to the REG index1 of the first subcarrier (adjacent to the DMRS) and the next second REG index 1 of the sub-carrier,... REG index 1 of the last sub-carrier, and REG index 2 of the first sub-carrier again. At this time, an interval between REs constituting the REG (or an interval between the first RE and the last RE in the REG) may be set to be larger than an interval between start points of the REGs.

  In FIG. 30, the interval between REs in the REG is four symbol intervals, but the interval between the start points of the REGs can be set at two symbol intervals. Therefore, in the UCI, REs belonging to different REGs on the time axis can be mapped in a staggered manner.

  Further, when configuring a REG with M REs dispersed on the same symbol (or subcarrier), the UE alternately maps UCI for N REGs by increasing the symbol (or subcarrier) index. UCI can be mapped in a manner.

  As a specific example, when mapping two REGs alternately, the UE sets the UCI to REG index1 of the first symbol (or subcarrier), REG index2 of the next second symbol (or subcarrier), and next REG index 1 of the third symbol (or sub-carrier), REG index 2 of the last symbol (or sub-carrier), REG index 2 of the first symbol (or sub-carrier), and then REG index 2 of the second symbol (or sub-carrier) REG index 1 of the carrier).

  FIG. 31 and FIG. 32 are diagrams simply illustrating an operation in which a UE alternately maps UCIs between REGs when the REGs are configured with M REs dispersed on the same symbol.

  FIG. 33 and FIG. 34 are diagrams simply illustrating an operation in which a UE alternately maps UCIs between REGs when the REGs are configured with M REs dispersed on the same subcarrier.

  Further, when the base station restricts the symbols that can be UCI mapped, the UE can perform UCI mapping in a distributed manner as shown in FIG. FIG. 35 is a diagram simply illustrating the UCI mapping operation of the UE when the base station allows the terminal to perform UCI mapping for the first, fourth, seventh, tenth, and thirteenth symbols. In FIG. 35, it is assumed that the UCI mapping order between symbols is determined in ascending order of symbol index.

  The above-mentioned second UCI transmission method can be applied in combination with other proposals of the present invention unless they conflict with each other.

  3.3. Third UCI transmission method

  When the UE performs UCI piggybacking on USCH1 for PUSCH1 and transmits PUSCH2 based on the minislot in the PUSCH1 transmission slot, the transmission symbol of UCI1 (or the RE on which UCI1 is mapped) collides with the resources of PUSCH2. be able to. At this time, the UE may perform one of the following operations.

  (1) Omit UCI1 transmission (Drop)

  (2) Omit PUSCH2 transmission (Drop)

  (3) Puncturing data of PUSCH2 allocated to one transmission symbol (or RE to which UCI1 is mapped), or removing UCI1 transmission symbol (or RE to which UCI1 is mapped) from PUSCH2 resources. Perform rate matching.

  As a specific example, assume that a UE transmits a PUSCH (PUSCH1) for an eMBB service in a 1 ms long slot. Then, assume that the base station instructs the UE to transmit PUSCH2 for URLLC service in less than 1 ms mini-slot in PUSCH1 transmission slot.

  At this time, when the UE performs the UCI piggyback on the PUSCH1, and the UCI collides with the PUSCH2, it is necessary to protect the transmission of the relatively important UCI. Ideally, the transmission region of PUSCH1 is redefined so as to exclude the transmission region of PUSCH2, and the UE can perform UCI mapping again on the redefined transmission resource region of PUSCH1. However, such a method is not a practical method when considering the processing time of the UE.

  Therefore, as a more practical method, a method in which transmission of PUSCH2 is not permitted for a symbol (or mapped RE) in which UCI in PUSCH1 is transmitted is considered.

  FIG. 36 is a diagram illustrating a case where PUSCH1 and UCI are transmitted, and PUSCH2 is transmitted in a minislot having a length of 2 symbols at the fourth and fifth symbol positions. In FIG. 36, the UE can apply puncturing or rate matching to the RE to which UCI in PUSCH1 is mapped, among the transmission resources of PUSCH2, and transmit the RE.

  In the above configuration, the following priorities are applied.

  eMBB Data <ULRRC Data <eMBB UCI <ULRRC UCI

  For example, when PUSCH2 includes UCI, the UE may transmit the complete PUSCH2 without performing puncturing or rate matching on the RE on which the UCI of the PUSCH1 region is mapped for PUSCH2.

  The above-mentioned third UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.4. Fourth UCI transmission method

  When the UE performs the UCI piggyback on the PUSCH, the UE can apply the PUSCH DM-RS pattern (Pattern A) when the UCI is not piggybacked and another PUSCH DM-RS pattern (Pattern B).

  At this time, the UE can perform UCI mapping on symbols adjacent to the PUSCH DM-RS according to Pattern B.

  As a characteristic example, Pattern B can have a higher DM-RS density than Pattern A.

  FIG. 37 is a diagram illustrating a DM-RS mapping pattern when a PUSCH is transmitted without UCI piggyback and when a PUSCH to which UCI piggyback is applied is transmitted.

  Specifically, when the UE performs the PUSCH transmission without the UCI piggyback, the UE can transmit the DM-RS with one symbol as illustrated on the left side of FIG. Alternatively, when the UE performs PUSCH transmission to which UCI piggyback is applied, as illustrated on the right side of FIG. 37, the UE transmits a DM-RS in two symbols to improve channel estimation performance, and further transmits each symbol. UCI mapping can be performed on DM-RS adjacent symbols.

  Also, when a further UL RS (eg, additional DM-RS or PTRS) is introduced in the PUSCH, a UCI mapping method may be different depending on whether or not a further UL RS exists.

  The above-described fourth UCI transmission method can be applied in combination with other proposals of the present invention unless they conflict with each other.

  3.5. Fifth UCI transmission method

  When the UE performs RE mapping of data on the PUSCH (or PDSCH), the UE performs time-priority mapping on a resource region corresponding to some symbols in the PUSCH (or PDSCH) transmission slot, and performs a resource region corresponding to the remaining symbols. Can be subjected to frequency priority mapping.

  When the UE performs RE mapping of data to the PUSCH, the frequency-first mapping scheme is advantageous for early decoding, but it is difficult to obtain time diversity. On the other hand, the time-first mapping scheme is somewhat disadvantageous for early decoding, but is advantageous for obtaining a time diversity gain.

  When minislot-based transmission such as URLLC is considered, it is more advantageous to disperse data in a time axis in order to reduce a characteristic of fast interference fluctuation or an influence from an instantaneous interference signal. Since early decoding is also an important characteristic of the NR system to which the present invention can be applied, in the NR system to which the present invention can be applied, it is possible to assist the UE to start decoding earlier. preferable.

  As a method for solving such a problem, the UE can perform time-priority mapping in the resource region corresponding to the symbol on the front side in the slot, and then perform frequency-priority mapping in the resource region corresponding to the symbol. In general, when the UE processes the data stored in the buffer, the UE utilizes a characteristic of high processing speed, so that the UE performs high-speed decoding after buffering data in the previous symbol, and then performs subsequent decoding. Decoding can be performed on the data in the symbol on the symbol side by the frequency-first mapping scheme. At this time, since time-priority mapping is applied to the data in the symbol on the front side, it is also effective in terms of time diversity gain.

  The above-mentioned fifth UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.6. Sixth UCI transmission method

  If the UE performs UCI piggyback on the PUSCH, the UE may perform UCI mapping in one of the following schemes.

  (1) Puncturing a part of the data RE and performing UCI mapping on the RE.

  (2) Apply rate matching that reduces some of the data REs and perform UCI mapping on the remaining REs (within the PUSCH).

  At this time, the UE can determine the data RE to be punctured (or rate-matched) so as to avoid a region (or a symbol) in which systematic bits of the encoded data bits are transmitted.

  As a specific example, if the systematic bits of the coded data bits are assigned to the symbols in reverse from the last symbol of the PUSCH, the UE may perform the following on the successive symbols from the first symbol (adjacent to the PUSCH DM-RS): UCI can be mapped by performing puncturing (or rate matching). Such an operation mitigates the effect of systematic bit puncturing in the UCI mapping process.

  Further, in the sixth UCI transmission method, the RE mapping order for data on the PUSCH that performs UCI piggybacking may be different from the RE mapping order for data on the PUSCH that does not perform UCI piggybacking. (Example: In the case of PUSCH that performs UCI piggyback, RE mapping is performed in reverse on the time axis)

  The above-mentioned sixth UCI transmission method can be applied in combination with other proposals of the present invention unless they conflict with each other.

  3.7. Seventh UCI transmission method

  If the PUSCH DM-RS is transmitted on one of the N interlace resources of the IFDMA scheme in the symbol, the UE may meet certain conditions (eg, the UE may transmit UCI piggyback on the PUSCH). If so, and / or if MU-MIMO (Multi User-Multiple Input Multiple Output) is deactivated, other interlace resources in the DM-RS symbol can be used for UCI mapping.

  Here, the base station indicates to the UE a DM-RS symbol and / or an interlace resource (within a symbol) for which UCI mapping can be performed by an upper layer signal (eg, RRC signaling) or a dynamic control signal (eg, DCI). can do.

  Specifically, in an NR system to which the present invention can be applied, in order to support MU-MIMO operation when transmitting a CP-OFDM-based PUSCH, it is necessary to guarantee orthogonality between DM-RS resources. In the case of the conventional LTE system, since the PUSCH is transmitted in the SC-FDMA scheme, a code shift multiplexing (CDM) such as a cyclic shift (CS) or an orthogonal cover code (OCC) is used for orthogonality between the PUSCH DM-RS. The method is applied. However, since the DM-RS RE mapping is relatively free in the CP-OFDM based PUSCH in the NR system to which the present invention can be applied, DM-RSs between different UEs can be distinguished by the FDM method. .

  Therefore, the PUSCH DM-RS can be transmitted on one of the N interlace resources (or one of the N combo resources) of the IFDMA scheme. At this time, when the UE performs UCI piggybacking on the PUSCH, it is preferable that the UE maps the UCI adjacent to the resource where the DM-RS is transmitted from the viewpoint of the accuracy of channel estimation. Therefore, if the remaining interlace resources (or the remaining combo resources) of the symbol in which the DM-RS is transmitted can be utilized, a method in which the UE performs UCI mapping on the corresponding resources is conceivable. However, this operation needs to consider the presence of the DM-RS of another UE in the remaining interlace resources (or the remaining combo resources) in the DM-RS transmission symbol when the MU-MIMO operation is deactivated. Can help only if not.

  The above-described seventh UCI transmission method can be applied in combination with other proposals of the present invention unless they conflict with each other.

  3.8. Eighth UCI transmission method

  When the UE performs the UCI piggyback on the PUSCH, the UCI mapping method when the UCI transmitted in the short PUCCH format is piggybacked on the PUSCH is different from the UCI mapping method when the UCI transmitted in the long PUCCH format is piggybacked on the PUSCH. .

  Here, the short PUCCH format refers to a PUCCH format configured with one or two symbols in a slot, and the long PUCCH format refers to a PUCCH format configured with more than two symbols in the entire slot.

  In the NR system to which the present invention can be applied, a short PUCCH format and a long PUCCH format are considered. In this case, the short PUCCH format is used when relatively low coverage is not required and a low latency is required, and the long PUCCH format is used when supporting a wide coverage.

  At this time, the maximum UCI payload size that can be transmitted in the short PUCCH format and the maximum UCI payload size that can be transmitted in the long PUCCH format can be different from each other. Therefore, the amount of RE required when the UE piggybacks the UCI on the PUSCH can be different. In particular, when the UE performs UCI piggybacking on REs distributed on the frequency axis, if the maximum UCI payload size to be transmitted is relatively small, the UE sets the frequency axis interval between REs performing UCI piggybacking in the PUCH. A wide setting can maximize the frequency diversity gain.

  Therefore, in the present invention, when performing UCI piggyback for a short PUCCH format and performing UCI piggyback for a long PUCCH format, the time axis and / or frequency axis interval between REs that perform UCI mapping is different in each case. We propose a method to apply different UCI mapping according to the maximum UCI payload size.

  The above-mentioned eighth UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.9. Ninth UCI transmission method

  If the UE performs UCI piggybacking on the PUSCH, UCI piggybacking may not be allowed for the following resources.

  (1) The symbol preceding the (first) DM-RS transmission symbol in the PUSCH transmission area. As an example, if the DM-RS position is fixed irrespective of the position of the starting symbol of the PUSCH, the UCI piggyback is not allowed for the PUSCH transmission symbol preceding the (first) DM-RS. Can be.

  (2) Symbol for performing DM-RS transmission of another terminal in the cell

  (3) Frequency resources utilized as DC (Direct Current) subcarriers (eg, subcarriers)

  -The above operation (3) is applied differently depending on the waveform applied to the PUSCH.

  -As an example, when applying CP-OFDM as a waveform, when performing UCI piggybacking, the UE performs puncturing or rate matching on DC subcarriers or DC subcarrier candidates, and transmits UL data using the corresponding subcarrier. Can be.

  -As another example, when applying DFT-s-OFDM as a waveform, when performing UCI piggybacking, the UE can also transmit UCI on the DC subcarrier. At this time, when the UCI is transmitted by the DC subcarrier, a code rate (code rate) for the UCI can be increased (by the number of DC subcarriers including the UCI).

  Here, the DC subcarrier is a subcarrier that the base station (e.g., eNB or gNB) notifies the UE that it can be used as DC, or the UE transmits to the base station (e.g., eNB or gNB) that it can be used as DC. Means the notified subcarrier.

  FIG. 38 is a diagram showing that a PUSCH DM-RS and a PT-RS (Phase Tracking-Reference Signal) exist in a slot.

  In FIG. 38, the PUSCH can be transmitted in Symbol # 0 and Symbol # 1. However, the UCI piggyback in Symbol # 0 and Symbol # 1 can be excluded so that the UCI piggyback rule is applied commonly regardless of the start symbol position of the PUSCH.

  Alternatively, when the start symbol and the end symbol for the PUSCH are dynamically changed, the UCI piggyback can be defined only for a symbol whose transmission is always guaranteed for any PUSCH. As an example, when there are 14 symbols in the entire slot, the start symbols for the PUSCH are Symbol # 0, # 1, # 2, and the end symbols are Symbol # 11, # 12, # 13, the UE determines that the PUSCH is When transmitted, the UCI piggyback can be applied only to the always existing Symbols # 3, # 4, # 5,..., # 10.

  Also, in order to support the MU-MIMO operation, UCI piggyback may not be performed on a potential symbol that can be transmitted by the DM-RS of another terminal. As an example, in FIG. 38, when MU-MIMO is performed between the PUSCH of UE1 that transmits DM-RS only to Symbol # 2 and the PUSCH of UE2 that performs DM-RS transmission only for Symbol # 2 and Symbol # 3, From the standpoint, it is preferable not to perform UCI piggyback on Symbol # 3. In particular, unlike data for DM-RS, when power boosting is applied, it is preferable not to perform UCI piggyback because interference of the corresponding symbol may be large.

  Also, when a specific sub-carrier in a resource is used as a DC carrier, UCI piggyback on the corresponding sub-carrier may not be performed.

  Further, the UCI piggyback can be allowed only when the number of symbols in the scheduling unit for transmitting the PUSCH is equal to or more than a certain value. As an example, in an NR system to which the present invention can be applied, a mini-slot including fewer symbols than a slot can be supported.

  At this time, if the number of symbols in the mini-slot is not enough, the ratio of data to be rate-matched or punctured by the operation of the UCI piggyback becomes relatively high, and the probability of data detection error during PUSCH transmission can be increased. . Therefore, UCI piggyback is allowed only when the number of symbols in the minislot is sufficient.

  In addition, a parameter applied to the UCI piggyback (eg, a coding rate adjustment parameter) is differently applied depending on the number of symbols in the scheduling unit in which the PUSCH is transmitted according to the number of symbols in the minislot. As an example, when the number of symbols in a mini-slot is small, a coding rate adjustment parameter (hereinafter, beta offset) for UCI piggyback is set small to reduce data resource loss, and the number of symbols in a mini-slot is large. , The Beta offset can be set large.

  Further, the base station can instruct the terminal of a symbol capable of performing UCI piggyback by DCI. For example, the base station may notify a UE of a starting symbol index and / or an ending symbol index capable of UCI piggybacking by UL scheduling DCI.

  The ninth UCI transmission method described above can be applied in combination with other proposals of the present invention unless they conflict with each other.

  3.10. Tenth UCI transmission method

  When the UE performs the UCI piggyback on the PUSCH, the UE performs the RE mapping method for the UCI (or the coded bits of the UCI) according to the RE mapping method (hereinafter, data-to-RE mapping) for the data (or the coded bits of the data). (Hereinafter, UCI-to-RE mapping) can be applied differently.

  More specifically, the above data-to-RE mapping and UCI-to-RE mapping are as follows.

  (1) The case where the data-to-RE mapping is a method that firstly satisfies the frequency axis resources (Frequency first mapping)

  At this time, the UCI-to-RE mapping may employ a method (Time-first mapping) in which resources on the time axis (whole or a specific part) are satisfied earlier than on the frequency axis. In this case, the specific partial resource of the time axis to which the UCI is mapped may be set to be the same or different for each frequency resource (eg, subcarrier, PRB, etc.) index.

  (2) When data-to-RE mapping is a method (Time first mapping) that satisfies time-axis resources first

  At this time, the UCI-to-RE mapping may apply a frequency-first mapping in which resources on the frequency axis (whole or specific part) are satisfied earlier than on the time axis. In this case, the specific partial resource of the frequency axis to which the UCI is mapped may be set to be the same or different for each time resource (eg, symbol, subslot, etc.) index.

  Here, the UE punctures a part of the data RE, performs UCI-to-RE mapping on the corresponding RE, or applies rate matching that reduces a part of the data RE, and UCI-to-RE mapping can be performed on the remaining REs.

  More specifically, when the data-to-RE mapping in the PUSCH is Frequency-first mapping, a CB (code block) for the data is also allocated to a series of REs by Frequency-first mapping. At this time, if Frequency-first mapping is also applied to the UCI-to-RE mapping, data RE punctured by UCI is collected in a data transmission RE group to which a specific CB is allocated, and data for the corresponding CB is collected. Demodulation performance may be degraded.

  In order to solve such a problem, when the data-to-RE mapping is Frequency-first mapping, Time-first mapping may be applied as UCI-to-RE mapping. In this case, from the viewpoint of one CB, only puncturing is performed on some REs corresponding to some coded bits, so that the influence of UCI piggyback on data demodulation performance can be reduced. Similarly, when the data-to-RE mapping in the PUSCH is based on Time-first mapping, Frequency-first mapping can be applied as the UCI-to-RE mapping.

  The tenth UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.11. Eleventh UCI transmission method

  In the following, the Counter DAI (downlink assignment index) (hereinafter c-DAI) is a DCI (or Scheduled) that informs the order between the PDSCH (or Transport block (hereinafter TB) or Code block group (hereinafter CBG)). Example: Refers to a specific index value in DL scheduling DCI, and Total DAI (hereinafter, t-DAI) is a DCI (eg, DL) that indicates the total number of PDSCHs (or TBs or CBGs) for which HARQ-ACK is to be reported. a specific index value in the scheduling DCI. At this time, when configuring the HARQ-ACK payload, the UE can configure input bits according to the order of c-DAI.

  In the above configuration, when the UE performs UCI piggybacking on the PUSCH, the base station reports the total number of PDSCHs (or TBs or CBGs) targeted for HARQ-ACK reporting to the UE by the t-DAI and the UL DAI (within the UL grant). I can let you know. At this time, the UE can determine the HARQ-ACK payload size using only the UL DAI value.

  Here, when performing UCI piggybacking, the UE may perform rate matching (or puncturing) for UCI transmission resources (in terms of PUSCH transmission).

More specifically, the UE performs UCI piggybacking on the PUSCH, and the base station reports the total number of PDSCHs (or TBs or CBGs) to be HARQ-ACK-reported to the t-DAI in DL assignment (= DL scheduling DCI). when it is possible to inform the base station considering HARQ-ACK report for a predetermined time _{N 1} pieces of PDSCH (or TB or CBG), after the predetermined time has elapsed, _{N 2} (≠ _{N 1)} pieces of PDSCH ( Or a HARQ-ACK report for the TB or CBG). Mismatch In this case, if the UE fails to detect for DL assignment including t-DAI to instruct _{two N,} HARQ-ACK payload size to be considered (for UCI piggyback) between the base station and the UE Can occur.

  Therefore, when the UE performs UCI piggybacking, the base station notifies the total number of PDSCHs (or TBs or CBGs) to be HARQ-ACK-reported by the UL DAI in the UL grant, and the UE (at least in the case of UCI piggybacking) It is possible to determine the UCI payload size for HARQ-ACK reporting using only the UL DAI in the UL grant, ignoring the t-DAI indication in the DL assignment. On the other hand, t-DAI can be used when a terminal reports HARQ-ACK to PUCCH.

  Hereinafter, in the present invention, a RESET (control resource set) refers to a physical resource area composed of a plurality of REGs (resource element groups), and a RESET includes one or more search spaces (SSs). This SS can be set to cell-specific (Cell-specific) or UE-specific (UE-specific) or UE-group specific (UE-group specific), and the UE is a PDCCH (or DCI (downlink control information)) that schedules DL data transmission in the SS. ) Can be detected.

  In the NR system to which the present invention can be applied, the core is set to a physical broadcast channel (PBCH) (for the purpose of RMSI (maintaining system information) transmission) and is set to a RESET (hereinafter referred to as RESETA) or RMSI (OSI (OSI)). RESET (hereinafter referred to as RESET B) for transmission of other system information and RESET (hereinafter referred to as RESET C) which is set by terminal-specific RRC signaling (mainly for transmitting Unicast data).

  In this case, the DAI field is not always present for the PDCCH (or fallback DCI) transmitted in the RESET A / B, and the DAI field is added / excluded for the PDCCH transmitted in the RESET C. Is done.

  Alternatively, it can be set so that the DAI field does not always exist for the PDCCH (or fallback DCI) transmitted in RESET A, and the DAI field is added / excluded for the PDCCH transmitted in RESET B / C.

  As described above, in the configuration in which the DAI field does not exist for the coreset set in the PBCH and / or the RMSI, the problem of the ambiguity due to the reconfiguration (Ambiguity) due to the re-configuration is removed in advance and the stable fall is always performed. This is to guarantee the back DCI format. If the DAI field can be set to be added / excluded for all coresets, there may be no fallback DCI format to support the UE while the base station performs reconfiguration for the DAI field.

  More specifically, the DAI is not always present in the DCI in the RESET set to the PBCH (and / or the RESET set to the RMSI), and the RESET (and / or the RMSI set by the RRC signaling) does not always exist. The DAI field can be set so as to be added / excluded in the DCI in the CORESET. (In the above, the RESET set by the RMSI can always be set such that the DAI field does not exist or the DAI field is added / excluded.)

  The same settings as described above can also be applied to HARQ timing indicators, HARQ-ACK PUCCH resource indicators, dynamic beta offset indicators, and the like. As an example, the HARQ timing indicator, HARQ-ACK PUCCH resource indicator, dynamic beta offset indicator, etc. may not be present in the CORSET set in the PBCH (and / or the DCIRC in the CORSET set in the RMSI but always in the DCIRC). It can be set to be added / excluded from DCI in the set RESET (and / or RESET set by RMSI).

  In addition, DAI is not always set in DCI in RESET set by PBCH or RMSI, and DAI can be set or not set in DCI in RESET set by RRC signaling.

  At this time, the same settings as above can be applied to the HARQ timing indicator, HARQ-ACK PUCCH resource indicator, dynamic beta offset indicator, and the like.

  The above-mentioned eleventh UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.12. Twelfth UCI transmission method

  When the UE performs UCI piggybacking on the PUSCH, a candidate for the HARQ-ACK reporting target PDSCH set (or TB or CBG set) for this UCI piggybacking is set by one of the following methods.

  (1) Set according to the method promised in advance

  (2) Set by upper layer signal (eg, RRC signaling)

  At this time, the base station indicates one of the plurality of candidates in a specific bit field in the UL grant, and the UE indicates the indicated HARQ-ACK report target PDSCH set (or TB or CBG). (Set) HARQ-ACK information can be configured to perform UCI piggyback.

  At this time, a specific PDSCH (or TB or CBG) in the PDSCH set (or TB or CBG set) includes a Carrier index, a slot index (or a time offset relative to a UCI piggyback transmission time point), a HARQ process ID, a TB index, and a CBG. index and PUCCH resource index are represented by one or more combinations.

  More specifically, the base station ranks up four (or HARQ-ACK report target) PDSCH (or TB or CBG) sets each composed of 20, 15, 10, and 5 PDSCHs (or TBs or CBGs) in advance. UE is set by a layer signal or the like, and then one of the four PDSCH (or TB or CBG) sets is selected by UL grant, and UCI piggyback on the corresponding PDSCH (or TB or CBG) set is performed. Can be instructed. The specific PDSCH (or TB or CBG) in the HARQ-ACK reporting PDSCH (or TB or CBG) set can be represented by a Carrier index and a time offset relative to the UCI piggyback time.

  The twelfth UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.13. Thirteenth UCI transmission method

  When the UE performs UCI piggybacking on the PUSCH, the UE performs rate matching (in terms of PUSCH transmission) on some UCI transmission resources of the UCI (eg, HARQ-ACK or CSI) targeted for UCI piggybacking. , Puncturing can be performed on the remaining UCI transmission resources (in terms of PUSCH transmission).

  Here, in the case of the Semi-persistent CSI report, the UE can perform puncturing (for PUSCH) on CSI transmission resources in consideration of the possibility of activation / release DCI.

  In the conventional LTE system, when the UE transmits HARQ-ACK to the UCI piggyback, the UE performs puncturing (in terms of PUSCH transmission) on the HARQ-ACK transmission resource. On the other hand, in the NR system to which the present invention can be applied, since the UCI payload size for HARQ-ACK transmission is expected to be large due to Code block-level HARQ-ACK transmission or the like, the UE needs HARQ for piggyback UCI. Performing puncturing (in terms of PUSCH transmission) on ACK transmission resources can degrade PUSCH performance (as opposed to rate matching).

  Therefore, at the time of UCI piggyback, it is preferable that the UE performs rate matching (in terms of PUSCH transmission) on HARQ-ACK transmission resources. At this time, if the base station sets the UCI payload size for the HARQ-ACK targeted for UCI piggyback to a specific fixed value without notifying the terminal by the actually scheduled PDSCH (eg, sdmi-static codebook), the UE may perform this operation. The only option is to perform rate matching on the PUSCH assuming a fixed UCI payload size. In this case, an unnecessarily large number of resources are allocated for HARQ-ACK transmission by rate matching, so that a resource allocation amount for data transmission in the PUSCH is relatively reduced.

  Therefore, in the present invention, when the UE performs UCI piggybacking, the UE performs rate matching (in terms of PUSCH transmission) on some HARQ-ACK (or CSI) transmission resources of HARQ-ACK (or CSI). Propose a method of performing puncturing (from a PUSCH transmission perspective) on the remaining HARQ-ACK (or CSI) transmission resources. Specifically, the UE can calculate a HARQ-ACK payload size based on a value preset by the base station and perform rate matching (from a PUSCH transmission viewpoint) on a corresponding HARQ-ACK transmission resource. However, if the HARQ-ACK payload size exceeds the set value, the UE sends a part of the HARQ-ACK to a transmission resource generated by applying rate matching (from a PUSCH transmission viewpoint), and sends the remaining HARQ-ACK to the remaining HARQ-ACK. The ACK can be transmitted to the generated transmission resource by performing puncturing (in terms of PUSCH transmission).

  Here, when the UE transmits specific HARQ-ACK (or CSI) information, whether to apply rate matching or puncturing to the corresponding UCI transmission resource (in terms of PUSCH transmission) depends on the corresponding HARQ-ACK. (Or CSI) is determined by the degree of delay (Latency) required. As an example, for HARQ-ACK (or CSI) in which the calculated delay (Latency) is equal to or less than a certain value, the UE performs puncturing (from a PUSCH transmission viewpoint) on the corresponding transmission resource, and the calculated delay is For HARQ-ACK (or CSI) that is equal to or more than a certain value, the UE can perform rate matching (from a PUSCH transmission viewpoint) on the corresponding transmission resource.

  The above-mentioned thirteenth UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.14. Fourteenth UCI transmission method

  When UE performs UCI piggyback on PUSCH, UE performs UCI piggyback by one of the following methods.

  (1) Method 1: Perform rate matching (in terms of PUSCH transmission) for all UCI transmission resources

  (2) Method 2: Perform rate matching (from a PUSCH transmission viewpoint) for some UCI transmission resources of the UCI, and perform puncturing (from a PUSCH transmission viewpoint) on the remaining UCI transmission resources.

  At this time, the base station can set which one of Method1 and Method2 the UE uses by one of the following methods.

  1) Instructed by DCI (eg UL grant)

  2) Set by upper layer signal (eg, RRC signaling)

  3) Select Method1 or Method2 according to UCI payload size (or t-DAI (or UL DAI) value in DL DCI (or UL grant)). As an example, when the UCI payload size (or t-DAI (or UL DAI) value in DL DCI (or UL grant)) is small, Method2 is applied, and when the value is large, Method1 is applied.

  4) Method1 is applied to semi-static A / N codebook, and Method2 is applied to dynamic A / N codebook.

  Here, when performing rate matching in Method 1 and / or Method 2 (from a PUSCH transmission point of view) and transmitting, the region to which rate matching is applied is distributed to the maximum for each CB or CBG of data in the PUSCH. RE mapping is performed.

  Specifically, when the UCI payload size targeted for UCI piggybacking is large, it is advantageous from the viewpoint of PUSCH performance that the UE performs rate matching on the UCI transmission resource (from the viewpoint of PUSCH transmission) and transmits the UCI. is there. On the other hand, when the UCI payload size targeted for UCI piggybacking is small, it is advantageous from the viewpoint of the complexity of the terminal that the UE performs puncturing on the UCI transmission resource (from the viewpoint of PUSCH transmission) and transmits UCI. is there.

  At this time, since the UE always knows the correct UCI payload size for the CSI, when performing UCI piggybacking, the UE can transmit after applying rate matching (in terms of PUSCH transmission) to the CSI transmission resource. In this case, the UE performs one of rate matching or puncturing (in terms of PUSCH transmission) on the HARQ-ACK transmission resource according to the HARQ-ACK payload size only when performing UCI piggyback for HARQ-ACK. Can be. As a result, the UE can perform UCI piggyback according to Method 1 or Method 2 for UCI piggyback.

  In the above configuration, whether to perform rate matching or puncturing (from a PUSCH transmission viewpoint) on HARQ-ACK transmission resources is determined by the base station in DCI and / or RRC signaling, or by the UE in HARQ-ACK payload. One scheme can be selected by an implicit rule determined based on the size.

  Furthermore, an operation (Method 3) in which the UE is instructed to perform puncturing (in terms of PUSCH transmission) for all UCI transmission resources at the time of UCI piggyback due to UL grant-to-PUSCH delay can also be considered. For example, when performing UCI piggybacking, the UE applies Method3 if the UL grant-to-PUSCH delay is less than a certain value, and applies Method1 if the UL grant-to-PUSCH delay is larger than a certain value. be able to. At this time, the reference value for judging the magnitude of the UL grant-to-PUSCH delay is a value promised in advance, or a value set by the base station based on an upper layer signal. Method 3 has an effect of enabling the UE to piggyback the UCI even if the transmission of the PUSCH is too early by enabling the UE to perform the PUSCH generation and the UCI piggyback in parallel.

  In addition, the UE's UCI piggyback method is set by one of the following depending on the maximum payload size (for HARQ-ACK or for the whole UCI):

  [1] Opt 1: When UCI piggybacking (transmission of UCI in PUSCH resource), UE performs rate matching-based UCI mapping (in terms of PUSCH transmission) for all UCIs.

  [2] Opt 2: When UCI piggyback (UCI transmission in PUSCH resource), the UE performs puncturing-based UCI mapping (for PUSCH transmission) for HARQ-ACK, and performs (PUSCH transmission viewpoint) for the remaining UCI types. Of) UCI mapping based on rate matching

  As an example, if the maximum payload size is greater than or equal to X [bits], Opt1 is applied, and if the maximum payload size is less than X [bits], Opt2 is applied.

  The maximum payload size is the number of CCs (Component Carriers) set for the CA (Carrier Aggregation) for the UE, the maximum number of TBs or CWs (codewords) set for each CC, and the number of TBs set for each CC. (The HARQ-ACK feedback is configured for each CB group), the number of HARQ-ACK transmission time candidates (per slot or TTI) set for the UE or for each CC, for the UE or for each CC The maximum HARQ process number is determined based on at least some of the combinations. For example, a UE having the above parameter settings may transmit a HARQ-ACK feedback bit corresponding to a case where DL data is scheduled using all of the maximum number of CCs, TB / CW, CBG, slot / TTI, and HARQ processes. The number can be determined as the maximum payload size.

  As an example, the maximum payload size is defined as follows.

  (Semi-static codebook during the configuration of the HARQ-ACK payload of the foundation) Number of configured CC, Number of CWs, Number of configured CBGs (per carrier), Number of HARQ timing candidates (or bundling window slots or minimum of HARQ timing candidates and The maximum payload size is determined by a combination of configured maximum HARQ process numbers.

  For example, if the HARQ-ACK payload size for HARQ-ACK is X bits or more, when performing UCI piggyback, the UE performs rate matching on UL data in the PUSCH, and the HARQ-ACK payload size for HARQ-ACK is If the number of bits is less than X bits, it is assumed that puncturing of UL data in the PUSCH is performed when performing UCI piggyback. At this time, the X value is determined by one of the following methods.

  1] Set the maximum HARQ-ACK payload size that can occur when receiving scheduling for a single PDSCH in a single carrier as the X value. As an example, the number of codewords is set to the maximum, and the HARQ-ACK payload size when the HARQ-ACK transmission is instructed for each CBG together with the maximum number of CBGs (per codeword) is set to the X value.

  2] When adding a CRC bit for HARQ-ACK exceeding Y bits without adding a CRC bit for HARQ-ACK having Y bits or less from the viewpoint of channel coding, set the Y value as an X value.

  Alternatively, when the base station performs UCI piggyback for a specific UCI to the terminal, one of rate matching or puncturing for UL data in the PUSCH is applied (independent of the UCI payload size) (for UE only). ) Can be set by higher layer signals such as RRC signaling.

  Furthermore, if the UE has a HARQ-ACK payload size of X bits or more for HARQ-ACK, when performing UCI piggyback, the UE performs rate matching on UL data in the PUSCH, and the HARQ-ACK payload size for HARQ-ACK is X If the number of bits is less than the bit, the UE can operate as follows when puncturing UL data in the PUSCH when performing UCI piggybacking.

  <1> Basic operation (eg, when less than X bits perform UCI piggyback for HARQ-ACK, perform PUSCH puncturing)

  Here, the basic operation is applied to the following cases.

  -When another upper layer signal is not set

  If PUSCH scheduled by DCI for fallback operation (within CSS)

  -PUSCH puncturing (for HARQ-ACK less than X bits) is indicated by higher layer signals (and / or DCI) such as RRC signaling

  <2> When PUSCH rate matching (for HARQ-ACK with less than X bits) is indicated by higher layer signals (and / or DCI) such as RRC signaling, the UE performs UCI piggyback on HARQ-ACK with less than X bits. When performing, PUSCH rate matching can be performed.

  The above-mentioned fourteenth UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.15. Fifteenth UCI transmission method

  When the UE performs the UCI piggyback on the PUSCH, the UE applies the time base UCI mapping differently according to the RE mapping scheme of the data (within the PUSCH).

  (1) When frequency-priority mapping is applied to data (example: CBG-based PUSCH while using CP-OFDM or DFT-s-OFDM)

  A. UCI in which puncturing is performed on transmission resources (in terms of PUSCH transmission). The UE performs distributed mapping on the time axis (relative to UCI).

  B. UCI in which rate matching is performed on transmission resources (in terms of PUSCH transmission). The UE performs distributed mapping or localized mapping (with respect to UCI) on a time axis. At this time, the base station can set one of the time axis variance mapping (for UCI) and the regional mapping by an upper layer signal (eg, RRC signaling).

  (2) When time-first mapping is applied to data (eg, DFT-s-OFDM)

  A. Perform regional mapping on the time axis (for UCI) (eg, when a front-loaded RS is present, perform UCI mapping on symbols adjacent to the RS)

  More specifically, when frequency-priority mapping is applied to data, distributed mapping (Distributed mapping) is applied in the time axis to UCI in which puncturing is performed on transmission resources (in terms of PUSCH transmission). Is preferably performed. If the UCI is not distributed and transmitted on the time axis, the CB (or CBG) is completely punctured (in terms of PUSCH transmission), and the probability that the base station fails in decoding increases.

  Therefore, frequency-first mapping is applied to data, and for UCI in which rate matching is performed on transmission resources (from the viewpoint of PUSCH transmission), localized mapping or distributed mapping is performed on the time axis for UCI. Is selected and applied. When the regional mapping is applied on the time axis, UCI mapping is performed on symbols adjacent to the RS, and there is a gain in terms of channel estimation performance. Alternatively, when the variance mapping is applied on the time axis, when the preemption right (Preemption) is applied to a series of symbols on the time axis, the preemption right is applied to only a part of the UCI. There is a gain in terms of UCI transmission performance.

  Alternatively, when time-first mapping is applied to data, regional mapping is applied to UCI on a time axis regardless of whether rate matching or puncturing is performed.

  The above fifteenth UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.16. Sixteenth UCI transmission method

  The UE can perform UCI piggyback on the PUSCH according to the following transmission scheme.

  (1) PUSCH transmitted without UL grant. As an example, SPS (semi-persistent scheduling) PUSCH

  (2) UL grant based PUSCH without reference information on UCI piggyback. As an example, PUSCH scheduled in UL grant in CSS (common search space)

  At this time, the UE may perform one of the following operations.

  1) After applying puncturing to UL data in the PUSCH, UCI piggyback is performed.

  A. If the UE has a scheduled (and also detected) PDSCH, the UE transmits only X bits of UCI (or the UCI corresponding to the scheduled PDSCH below). Or if the UE has no scheduled (and detected) PDSCH, the UE does not perform UCI piggyback.

  B. At this time, when the UCI payload size exceeds X bits, the UE transmits only UCI up to X bits, and omits transmission for the remaining UCI.

  2) The UE performs UCI piggyback after applying rate matching to UL data in the PUSCH.

  A. If the UE has a scheduled (and detected) PDSCH, the UE transmits only X bits of UCI (or less, the UCI corresponding to the scheduled PDSCH). If the UE has no scheduled (and detected) PDSCH, the UE does not perform UCI piggyback.

  B. At this time, if the UCI payload size exceeds X bits, the UE transmits only UCI up to X bits, and omits the transmission for the remaining UCI.

  C. Further, the UE transmits information on the presence / absence of rate matching (or presence / absence of UCI piggyback) and / or the amount of UL data (or UCI payload size) to which rate matching is applied to the base station by one of the following methods.

  1> The UE transmits the above information to the RE in the PUSCH generated by applying puncturing (or rate matching) to the UL data in the PUSCH after performing the division coding (Separate coding) with the UCI.

  2> Transmit on DM-RS in the form of switching DM-RS sequence based on the above information

  3> Transmit on CRC mask in the form of switching the CRC mask based on the above information

  More specifically, when the UE performs UCI piggybacking on the PUSCH, the UE can perform rate matching on UL data in the PUSCH in consideration of UCI transmission. At this time, in order to facilitate decoding of the PUSCH to which the rate matching has been applied from the viewpoint of reception of the base station, the amount of UL data to which the rate matching in the PUSCH is applied between the base station and the terminal is determined in advance. You need to make a promise.

  As a method for this, when the base station schedules the PUSCH by the UL grant, whether or not rate matching is applied in the corresponding PUSCH and the amount of UL data to which the rate matching is applied (or UCI payload size related information that can estimate the corresponding data amount). To the UE.

  However, in the case of a PUSCH transmitted without an UL grant, such as an SPS PUSCH, the base station cannot transmit information on the amount of UL data to which rate matching in the PUSCH is applied to the UE. Therefore, in the above case, it is preferable that the UE perform puncturing on the UL data (on the RE where the UCI was transmitted) in the PUSCH at the time of UCI piggyback.

  Alternatively, the UE applies rate matching to UL data in the PUSCH for UCI piggybacking on the PUSCH without UL grant, and information on whether the UE has applied rate matching and / or the amount of UL data to which rate matching has been applied. Etc. can be further transmitted to the base station. For a PUSCH scheduled without reference information on the UCI piggyback in the UL grant (eg, a PUSCH scheduled by the UL grant in the CSS), the UE also performs a UCI piggyback operation similar to the case of the PUSCH with UL grant. It can be carried out.

  On the other hand, when the UE performs the UCI piggyback on the UL grant-based PUSCH (or the UL grant-based PUSCH with reference information on the UCI piggyback), the UE uses the corresponding UL grant (or the corresponding reference information) to transmit the UL data in the PUSCH. After performing rate matching (or puncturing) with respect to, UCI piggyback can be performed.

  Further, the UE can perform UCI piggyback on the PUSCH according to the following transmission scheme.

  [1] PUSCH to transmit without UL grant. As an example, SPS (semi-persistent scheduling) PUSCH

  [2] UL grant based PUSCH without reference information on UCI piggyback. As an example, PUSCH scheduled in UL grant in CSS (common search space)

  At this time, the UE operates as follows.

  Specifically, the base station preliminarily sets (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) for rate matching (or puncturing) with respect to UL data in the PUSCH to a higher (UE-specific) order. The UE can be notified by a layer signal (eg, RRC signaling).

  A. At this time, if the UE has a scheduled (and detected) PDSCH, the UE responds to the (maximum) HARQ-ACK payload / codebook (size) indicated by the base station, and the UL data in the PUSCH. After applying rate matching (or puncturing) to UCI piggybacking.

  B. Or if the UE has no scheduled (and detected) PDSCH, the UE does not perform UCI piggyback.

  Here, the (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) set to the terminal by the base station is the largest UCI payload / codebook (transmission) that can be transmitted via one PUCCH or PUSCH. Size) or a value that is set separately for a PUSCH (eg, SPS PUSCH) according to the upper transmission scheme (this is a value smaller than the maximum UCI payload / codebook (size) value in the case described above). be able to.

  In summary, when the UE sends HARQ-ACK on the SPS PUSCH, the UE can perform UCI piggyback according to the codebook as follows.

  <1> In case of quasi-static HARQ-ACK codebook

  The UE may perform UCI piggyback after applying rate matching (or puncturing) to UL data in the PUSCH corresponding to the (maximum) HARQ-ACK payload / codebook (size) indicated by the base station. it can.

  <2> When it is a dynamic HARQ-ACK codebook and there are c-DAI and t-DAI in DL DCI

  After calculating the HARQ-ACK payload size based on the c-DAI and t-DAI values, the UE applies rate matching (or puncturing) to UL data in the PUSCH corresponding to the HARQ-ACK payload size, and then calculates the UCI Do piggyback.

  <3> When it is a dynamic HARQ-ACK codebook and there is only c-DAI in DL DCI

  1> Opt. 1: UE calculates HARQ-ACK payload size using UL DAI in SPS PUSCH activation DCI, and then applies rate matching (or puncturing) to UL data in PUSCH corresponding to HARQ-ACK payload size. And perform UCI piggyback.

  2> Opt. 2: The UE assumes a HARQ-ACK payload size set by an upper layer signal, applies rate matching (or puncturing) to UL data in the PUSCH corresponding to the HARQ-ACK payload size, and then UCI piggy Do the back.

  Further, the UE can perform UCI piggyback on the PUSCH according to the following transmission scheme.

  [1] PUSCH to transmit without UL grant. As an example, SPS (semi-persistent scheduling) PUSCH

  [2] UL grant based PUSCH without reference information on UCI piggyback. As an example, PUSCH scheduled in UL grant in CSS (common search space)

  At this time, the UE operates as follows.

  Specifically, the base station preliminarily sets a (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) for rate matching with respect to UL data in the PUSCH in an upper layer signal (eg, for UE). UE can be notified by RRC signaling).

  A. At this time, the UE has a scheduled (and detected) PDSCH,

  i. If the UCI payload size is less than or equal to X (eg, X = 2) bits (from the terminal's point of view), the UE applies puncturing to UL data in the PUSCH and then performs UCI piggybacking.

  ii. If the UCI payload size (from the terminal's point of view) exceeds X bits (e.g., X = 2), then the UE will be in the PUSCH corresponding to the (maximum) HARQ-ACK payload / codebook (size) indicated by the base station. UCI piggyback is performed after applying the rate matching to the UL data of.

  B. If the UE has no scheduled (and detected) PDSCH, the UE does not perform UCI piggyback.

  Here, the (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) set by the base station to the terminal is the maximum UCI payload / codebook (size) that can be transmitted via one PUCCH or PUSCH. ) Or a value separately set for a PUSCH (eg, SPS PUSCH) according to a transmission scheme (at this time, the above value is smaller than the above-mentioned maximum UCI payload / codebook (size) value).

  In this configuration, the base station transmits a PUSCH (eg, SPS PUSCH) transmitted without UL grant or a PUSCH based on UL grant without reference information on UCI piggyback (eg, PUSCH or CSS scheduled by DCI without DAI field). When performing PUSCH rate matching / puncturing for a UCI piggyback operation on a PUSCH scheduled in the UL grant of the UL grant, the above (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) serving as a reference ) May be signaled to the UE by higher layer signals (eg, RRC signaling) and / or DCI. At this time, the (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) can be set as follows.

  Specifically, the (maximum) UCI (eg, HARQ-ACK) payload / codebook (size) is obtained by excluding the number of PRBs allocated in the PUSCH resource and / or the OFDM symbol in which the DM-RS is transmitted. It is set to be proportional to the number of OFDM symbols (remaining) and / or MCS (index).

  As an example, the base station may transmit the (maximum) UCI (eg, HARQ-ACK) payload / codebook (for each combination of the number of PRBs and / or the number of OFDM symbols (excluding DM-RS symbols) and / or the MCS (index)). Size) can be set.

  As another example, the base station sets a ratio Z indicating (corresponding) (maximum) UCI (e.g., HARQ-ACK) payload / codebook (size) per (K) REs and (overall) in the PUSCH. ) Apply the above ratio Z to the number of REs to derive the final (maximum) UCI (eg, HARQ-ACK) payload / codebook (size).

  As another example, the base station configures a ratio Z indicating (corresponding) (maximum) UCI (e.g., HARQ-ACK) payload / codebook (size) per (K) code bits, and By applying the ratio Z to the total number of code bits, a final (maximum) UCI (eg, HARQ-ACK) payload / book (size) can be derived.

  Thereafter, when the UE piggybacks the UCI, the UE applies rate matching or puncturing to UL data in the PUSCH according to the (maximum) HARQ-ACK payload / codebook (size) indicated by the base station. Later, a UCI piggyback can be performed.

  Further, when the UE performs UCI piggyback for HARQ-ACK on the SPS PUSCH, the UE assumes that the (maximum) HARQ-ACK payload size set in advance by the upper layer signal by the base station is rate matching for UL data in the PUSCH. Alternatively, after puncturing, the UCI RE can be mapped (in a pre-promised manner).

  On the other hand, when the UE performs the UCI piggyback on the UL grant-based PUSCH (or the UL grant-based PUSCH with reference information on the UCI piggyback), the UE uses the corresponding UL grant (or the corresponding reference information) to transmit the UL data in the PUSCH. After performing rate matching (or puncturing) with respect to, UCI piggyback can be performed.

  The sixteenth UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.17. Seventeenth UCI transmission method

When the base station instructs the UIE on the UCI payload size (or the amount of UL data to be rate-matched) and the UE applies rate matching to the UL data in the PUSCH, and then performs UCI piggybacking, the UE uses (PUSCH transmission slot When a UCI bit exceeding the UCI payload size (or the amount of UL data to be rate-matched) specified by the base station is generated, the UCI (hereinafter, UCI _new ) bit corresponding to the excess is generated by one of the following operations. Can be sent.

(1) Puncturing some symbols in the PUSCH and transmitting UCI _new on the (short) PUCCH that is TDM and PUDM on this symbol

  (2) Perform HARQ-ACK bundling and perform UCI piggyback on (bundled) HARQ-ACK bits equal to or smaller than the UCI payload size (or the amount of UL data to be rate-matched) specified by the base station. At this time, the HARQ-ACK bundling may include at least the amount of the HARQ-ACK feedback for the last received PDSCH exceeding the UCI size.

Here, the UCI _new may be HARQ-ACK information on the PDSCH scheduled after the UL grant.

Further, a time point (eg, slot # n-k _MIN ) before a minimum value (eg, k _MIN ) with respect to the UL grant-to-PUSCH time (or PUSCH processing time) based on the PUSCH transmission time point (eg, slot #n). The UCI bit that occurs later can be excluded from the UCI piggyback target for the PUSCH.

  HARQ-ACK bundling refers to a process of combining (partially) HARQ-ACK bits by a logical AND operation to compress the entire UCI payload size.

  Specifically, when the UE performs rate matching on UL data in the PUSCH in accordance with the UCI amount transmitted for UCI piggybacking, the base station sets the UCI payload size for UCI piggybacking (or the rate matching target for UCI piggybacking). UL data amount) can be notified to the UE by DCI such as UL grant.

  However, due to scheduling, a UCI bit exceeding the UCI payload size (or the amount of UL data to be rate-matched) instructed at the time when the base station transmits the UL grant in the actual PUSCH transmission slot may occur. it can.

  For example, when the NR system to which the present invention is applicable supports flexible scheduling timing, it is instructed that the HARQ-ACK bit for the PDSCH scheduled after the UL grant is reported in the PUSCH transmission slot. Can be By this means, it is possible to generate HARQ-ACK bits that exceed the UCI payload size (or the amount of UL data to be rate-matched) in the PUSCH transmission slot indicated by the base station in the UL grant (or the amount of UL data to be rate-matched).

  In this case, the UE punctures some of the symbols in the PUSCH and transmits the portion exceeding the UCI by the punctured symbols to the short duration PUCCH, or the entire (up to the portion exceeding the UCI). By applying HARQ-ACK bundling to some (or all) UCI bits of UCI bits, a (bundle) HARQ-ACK within the UCI payload size expected by the base station can be UCI piggybacked to the PUSCH and transmitted. .

  Further, when the UE performs UCI piggyback on the PUSCH, UCI bits exceeding the UCI payload size (or the amount of UL data to be rate-matched) specified by the base station (by UL grant) can be generated. At this time, the UE can further report presence / absence beyond the UCI and / or size information beyond the UCI to the base station. As an example, the UE always sends a HARQ-ACK to be transmitted from the HARQ-ACK payload size notified by the base station in a UL grant (eg, UL DAI) by a 1-bit size indicator (eg, 1-bit indicator). It can indicate whether the payload size is small or large.

  Further, when the UE performs UCI piggybacking on the PUSCH, UCI bits exceeding the UCI payload size (or the amount of UL data to be rate-matched) specified by the base station (by UL grant) can be generated. At this time, the UE performs ACK / NACK bundling on the HARQ-ACK bit, and then transmits information to the base station together with information (eg, 1-bit indicator) indicating whether to perform bundling of the (bundle) HARQ-ACK bit. Can report. At this time, if the number B of the bundled HARQ-ACK bits is smaller than the UCI payload size A indicated by the base station, the UE adds (AB) bits of padding bits to the B bits of the bundled HARQ-ACK bits. (Example: “0” or “1”) can be added to configure and transmit a UCI payload of a total of A bits.

  The seventeenth UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.18. Eighteenth UCI transmission method

  When the UE performs UCI piggybacking after performing rate matching on UL data in the PUSCH, the UE performs scaling for TBS (transport block size) according to the rate matching target UL data amount (or the number of Rate-matched REs). ) Can be applied.

  Here, the base station informs a specific bit field (eg, 1-bit indicator) in DCI (eg, UL grant) of the presence / absence of TBS scaling based on the amount of UL data (or the number of Rate-matched REs) to be rate-matched. Alternatively, the UE can be notified by an upper layer signal (eg, RRC signaling).

  More specifically, when the number of HARQ-ACK bits that are HARQ-ACK backed by setting the HARQ-ACK feedback for each CBG, the CA operation for five carriers or more, and the like are greatly increased, the UCI piggyback for the HARQ-ACK of the UE is performed. If rate matching is applied to UL data in the PUSCH during the process, transient data bits are rate-matched and performance degradation may be severe.

  Therefore, in such a case, the operation of setting the TBS small in consideration of the RE reduced by the rate matching is more advantageous. As an example, if as many as 1 / N REs in the PUSCH are rate matched, the UE may scale the TBS at a ratio of 1-1 / N = (N-1) / N. Whether the TBS scaling by the UCI piggyback is applied or not can be indicated by the base station by a UL grant or an upper layer signal.

  The eighteenth UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.19. Nineteenth UCI transmission method

  If the UE performs UCI piggybacking on the PUSCH, the base station may indicate the UCI payload size to the terminal by one or more of the following methods.

  (1) After setting a UCI payload size set by an upper layer signal (terminal specific), a specific UCI payload size in the set is indicated by DCI (eg, UL grant).

  (2) After the (reference) UCI payload size is set by an upper layer signal (terminal specific), the ratio of the transmitted UCI payload size to the (reference) UCI payload size is indicated by DCI (eg, UL grant). At this time, the base station can also set the value of the above ratio in the terminal by the upper layer signal (terminal specific).

  Here, the base station can make one state of the indicator (State) mean a UCI payload size of 2 bits or less (or puncturing for PUSCH) by DCI (eg, UL grant). In this case, the UE can perform UCI mapping after performing puncturing on the PUSCH (according to the UCI payload size recognized by itself).

  Also, if the UCI payload size (A) recognized by the UE is smaller than the UCI payload size (B) specified by the base station, the UE may add the UCI payload size (A) recognized by the UE according to the coding type applied to the B. The encoding may be performed, or the UCI encoding may be performed on the UCI payload size (B) specified by the base station (filling the remaining bits with NACK information). For example, if the coding type is RM (Reed-Muller) coding, the UE can perform UCI encoding based on the UCI payload size (A). As another example, if the coding type is Polar coding, the UE may perform UCI encoding based on the UCI payload size (B).

  Specifically, the base station can indicate the UCI payload size as shown in the following table using a 2-bit field in a UL grant having four states.

  Alternatively, the base station sets the (reference) UCI payload size to 10 bits in the terminal and has four states of the ratio of the UCI payload size that actually performs UCI piggybacking to the (reference) UCI payload size as shown in the table below. This can be indicated by a 2-bit field in the UL grant.

  Such an operation allows the base station to more flexibly indicate the UCI payload size that the UE considers for performing rate matching / puncturing on the PUSCH.

  The nineteenth UCI transmission method described above can be combined and applied unless it conflicts with the other proposals of the present invention.

  3.20. Twentieth UCI transmission method

  It is assumed that the UE performs puncturing-based UCI piggybacking on the PUSCH for UCI of N (eg, N = 2) bits or less, and performs rate matching-based UCI piggybacking on the PUSCH for UCIs exceeding N bits. At this time, the UE can perform UCI piggybacking as in Option B for UCI bits exceeding the UCI payload size specified by the base station in one or more of the following Option A cases.

  [Option A]

  (1) When the base station instructs the UE to perform PUSCH puncturing for N-bit UCI, but the UCI payload size to be actually transmitted exceeds N bits

  (2) When the base station instructs the UE to perform PUSCH rate matching for M (where M> N) bits of UCI, but the UCI payload size to be actually transmitted exceeds M bits

  [Option B]

  1) After dividing the exceeded UCI bits in N bits, separate coding is performed separately from the indicated UCI payload, and the encoded bits corresponding to each division are separated by REs. (PUSCH Puncturing base) Perform RE mapping

  2) When there are a plurality of N-bit UCIs (for example, K), up to L (e.g., 1) of the K N-bit UCIs are piggybacked on the PUSCH, and the remaining (K). For (L) UCIs, transmission can be omitted (dropped).

  Furthermore, if the base station does not instruct the terminal in particular regarding PUSCH rate matching or puncturing (or UCI payload size), the UE divides the UCI bits in N bits, then performs separate coding, and performs each division. Can be RE mapped to REs that are partitioned from each other. Also in this case, if there are a plurality of N-bit UCIs (for example, K), the UE performs piggybacking on the PUSCH for up to L (eg, 2) of the K N-bit UCIs. , The transmission of the remaining (KL) UCIs can be omitted.

  As an example, the UE can perform UCI piggyback based on puncturing of the data area in the PUSCH for UCI of 2 bits or less, and perform UCI piggyback based on rate matching of the data area in the PUSCH for UCI of 3 bits or more. It can be carried out. If a UCI bit exceeding the UCI payload size specified by the base station is generated, the UE may completely eliminate the exceeded UCI bit with UCI piggyback or perform puncturing for the PUSCH that can be performed without the instruction of the base station. UCI piggyback.

  However, since the UE can perform puncturing of the data area in the PUSCH only for UCI of 2 bits or less, the UCI bits exceeding 2 bits are divided in units of 2 bits, each of which is divided and coded to correspond to each division. The coded bits can be punctured into REs that are partitioned from each other.

  As an extended example of the above operation, if the base station does not specifically instruct the UE in relation to PUSCH rate matching / puncturing (eg, fallback DCI), the UE divides the UCI bits in N bits and then performs division coding. , The coded bits corresponding to each division can be RE mapped to REs that are partitioned from each other.

  In the following description, UCI piggyback based on PUSCH rate matching (or puncturing) is performed after UE applies rate matching (or puncturing) to UL data in PUSCH at the time of UCI mapping in PUSCH. ) Means an operation of transmitting UCI to the remaining resources.

  Further, if the UE performs UCI piggyback (for HARQ-ACK), the UE may select and apply PUSCH rate matching or PUSCH puncturing as follows.

  [1] When the base station indicates a PUSCH rate matching operation (for a specific UCI payload size) by DCI (eg, UL grant) or indicates a value of a specific UCI payload size (eg, exceeding N bits)

  A. The UE performs UCI piggyback based on PUSCH rate matching for UCI payload size (with or without scheduled DL data).

  B. Here, when the base station indicates the PUSCH rate matching operation, the specific UCI payload size (for PUSCH rate matching) is set to the maximum HARQ-ACK payload size set in the UE or the base station. Can be set in advance by an upper layer signal (eg, RRC signaling).

  [2] When the base station does not indicate a PUSCH rate matching operation (for a specific UCI payload size) by DCI (eg, UL grant), or does not indicate a value of a specific UCI payload size (for example, exceeding N bits) Or when instructing PUSCH puncturing operation

  A. The UE performs UCI piggyback based on PUSCH puncturing (for up to N bits of UCI bits) when there is a UCI to transmit (at least one or more scheduled DL data).

  B. The UE does not perform UCI piggyback if there is no UCI to send (no scheduled DL data).

  More specifically, the base station sets a quasi-static codebook to the UE by an upper layer signal (or sets a HARQ-ACK payload size of a UCI piggyback target by an upper layer signal), and provides a UL grant to the UE. The presence / absence of PUSCH rate matching can be indicated by a 1-bit size indicator (eg, on / off indicator) in the DCI. At this time, if the UE receives the 'on' instruction, the UE can perform PUSCH rate matching corresponding to a HARQ-ACK payload size set in advance from the base station, and then perform UCI piggybacking. Conversely, if the UE receives the 'off' indication, the UE may perform PUSCH puncturing based UCI piggyback on the HARQ-ACK payload size (up to the maximum N bits) recognized by the UE. In addition, when the UE receives the 'off' instruction, the UE can assume that there is no HARQ-ACK to be subjected to the UCI piggyback.

  Further, when the base station dynamically indicates the HARQ-ACK payload size (for UCI piggyback) to the UE by DCI (eg, DL assignment, UL grant) or the like in a dynamic codebook scheme, the UE sends a specific When the HARQ-ACK payload size value is indicated, the UCI piggyback operation can be performed after performing PUSCH rate matching based on the corresponding UCI payload size. On the other hand, if the base station does not indicate a specific HARQ-ACK payload size value or explicitly indicates PUSCH puncturing, the UE assumes that there are HARQ-ACK bits to report (HARQ-ACK up to N bits). UCI piggyback based on PUSCH puncturing can be performed. On the other hand, if the base station does not indicate a specific HARQ-ACK payload size value or explicitly indicates PUSCH puncturing and there is no HARQ-ACK bit reported by the UE, the UE may not perform UCI piggybacking. it can.

  The twentieth UCI transmission method described above can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.21. 21st UCI transmission method

  When the UE performs UCI piggybacking on the PUSCH, the base station sets a beta (Beta) value that is a design parameter, and the UE reflects the value to encode the symbols for UCI transmission in the PUSCH. Numbers can be calculated. At this time, the base station sets the beta value to the UE by one of the following methods.

  (1) A method in which a base station sets a single set for beta values by higher layer signals (eg, RRC signaling) and then indicates a specific beta value in the set by DCI (eg, UL grant)

  (2) The base station sets a plurality of sets for the beta value by an upper layer signal (eg, RRC signaling), and after one set is selected according to a specific condition, performs the above selection by DCI (eg, UL grant). To indicate a specific beta value in a given set

  (3) After the base station sets a plurality of sets for the beta value by an upper layer signal (eg, RRC signaling), then indicates one set by DCI (eg, UL grant), and then sets the set according to specific conditions. How a particular beta value in a is selected

  Here, the specific condition is one of the following.

  1) Opt. 1: UCI related information (eg: UCI payload size (for example, whether it is less than X bits or more), Coding scheme (for example, RM code (RM code) (without CRC) or polar code (polar code)) (Whether CRC)

  2) Opt. 2: PUSCH related information (eg, MCS (eg, whether MCS index is less than or equal to X) or more, code rate (code rate) (eg, whether code rate is less than or greater than X, RB allocation (For example, whether the number of RBs allocated to PUSCH is less than X or more), duration (for example, whether the number of allocated OFDM symbols is less than X or more)

  Here, the beta value is set by a different setting method for a plurality of UCI types. As an example, the beta value for UCI type 1 is set by RRC signaling, and the beta value for UCI type 2 is set by DCI (and RRC signaling). At this time, UCI types 1 and 2 are set to HARQ-ACK and CSI, respectively, or UCI types 1 and 2 are set to CSI and HARQ-ACK, respectively.

  At this time, the base station sets a single set having beta values for two or more UCI types as one element, and then indicates a specific beta value of the set by DCI (eg, UL grant).

  Such a beta value can be independently set according to the presence / absence of rate matching / puncturing for the PUSCH waveform and / or the PUSCH.

  Also, for a PUSCH scheduled by a UL grant in a common search space (CSS), a beta offset value independent of a PUSCH scheduled by a UL grant in a UE-specific search space (USS) can be set. . At this time, the base station can set a quasi-static beta offset value by RRC signaling for the former PUSCH, and can indicate a dynamic beta offset value by DCI signaling for the latter PUSCH.

  More specifically, when the UE calculates the number of UCI transmission REs in the PUSCH, the base station sets a beta value, which is a design variable, to adjust a coding rate and the like, and the UE reflects the UCI by reflecting this. The number of coded symbols for transmission can be calculated. At this time, in the NR system to which the present invention can be applied, since the transmission section of each PUSCH is dynamically changed, it is preferable to dynamically set the beta value according to the amount of PUSCH resources actually used. .

  As an example of this, the base station may configure a single set of beta values in higher layer signals and then dynamically inform the DCI of the specific beta value in the set to the UE.

  At this time, the range of the beta value is set to be different depending on the UCI payload size. When the UCI payload size is small (for example, when the UCI payload size is X bits or less), the coding symbol for UCI transmission in the UCI PUSCH resource has room, but when the UCI payload size is large (for example, If the UCI payload size exceeds X bits), the coded symbols for UCI transmission in UCI PUSCH resources are minimized because UCI has a large effect on data in PUSCH. To this end, the base station may set a plurality of sets for the beta value, select a specific set according to the UCI payload size, and again indicate a specific beta value in the set by DCI (eg, UL grant). it can.

  To summarize this configuration more generally, the base station can set a plurality of sets for the beta value. Thereafter, the particular beta value can be set (determined) to one of the beta values included in the plurality of sets by a combination of the particular condition and the indication in the DCI.

  Furthermore, in the present invention, the beta offset value is utilized to calculate the number of REs (or the number of coded symbols or the number of OFDM resources) in which the (specific) UCI transmitted in the (specific) PUSCH is transmitted. Value. As an example, when the base station sets a large beta offset value, the number of UCI transmission REs in the PUSCH is set relatively large. Conversely, when the base station sets a small beta offset value, the number of UCI transmission REs in the PUSCH may be set relatively small.

  Further, the base station sets (in terms of a specific UCI type) a plurality of beta offset sets (by higher layer signals such as system information or RRC signaling) and the UE (when performing UCI piggyback) One beta offset set can be selected from the plurality of beta offset sets based on one or more pieces of information on the beta offset set.

  [1] Number of codewords (eg, whether the number of codewords is one or two)

  [2] UCI payload size (Example: UCI payload size range)

  [3] PUSCH waveform (example: CP-OFDM or DFT-s-OFDM)

  [4] Resource amount allocated to PUSCH (example: time / frequency resource amount)

  [5] Existence of rate matching / puncturing for PUSCH

  [6] Coding scheme (example: RM code or polar code)

  [7] Modulation order for PUSCH (example: application of BPSK)

  Thereafter, the base station may further indicate to the UE a specific beta offset value in the selected set of beta offsets by DCI (eg, UL grant).

  Alternatively, the base station may (in terms of a particular UCI type) provide the UE with multiple sets of beta offsets (by higher layer signals such as system information or RRC signaling) for each combination for one or more of the following conditions: Independently configured, the UE can select a set of beta offsets (when performing UCI piggyback) that meets its requirements.

  1] Number of codewords (eg, whether the number of codewords is one or two)

  2] UCI payload size (Example: UCI payload size range)

  3] PUSCH waveform (example: CP-OFDM or DFT-s-OFDM)

  4] Resource amount allocated to PUSCH (example: time / frequency resource amount)

  5] Existence of rate matching / puncturing for PUSCH

  6] Coding scheme (Example: RM code or polar code)

  7] Modulation order for PUSCH (eg, whether or not BPSK is applied)

  Thereafter, the base station may further indicate to the UE a specific beta offset value in the selected set of beta offsets by DCI (eg, UL grant).

  In the present invention, a UE is generally scheduled to apply a CP-OFDM waveform (or waveform type A) for PUSCH, but is scheduled by a specific DCI (or DCI type) (indicating fallback operation). It can be assumed that a DFS-s-OFDM waveform (or waveform type B ≠ A) is applied to a PUSCH that has been subjected to a fallback operation or other PUSCH. At this time, the UE can select differently a beta offset value (or a beta offset set) (in terms of a specific UCI type) to apply (when performing UCI piggyback) according to the PUSCH waveform (or PUSCH scheduling DCI type). . In particular, when transmitting the PUSCH by the fallback operation, the UE may apply a basic beta offset (or a default beta offset set) set by system information (eg, PBCH, SIB, RMSI) or the like. . However, the fallback operation may mean a basic transmission technique that the UE can support (without information specific to another terminal).

  In the present invention, a (specific) beta offset value that is an element in the beta offset set can be interpreted as an alternative to a (specific) beta offset value combination for a (specific) UCI type combination. As an example, if there are N UCI types (eg, UCI1, UCI2, UCI3,..., UCI N), the beta offset value can be replaced with a combination of N beta offset values for the N UCI types (eg, : Β = {β1, β2, β3,..., ΒN}).

  The 21st UCI transmission method described above can be combined and applied unless it conflicts with other proposals of the present invention.

  3.22. Twenty-second UCI transmission method

  In the following description, the counter DAI (downlink assignment indicator) in DL scheduling DCI (downlink control information) (hereinafter DL assignment) is the PDSCH (or TBB in which the DL assignment schedules or the TBSCH in which the DL assignment is scheduled). It is assumed that the total DAI (within DL assignment or UL scheduling DCI (hereinafter, UL grant)) means information indicating the number of (whole) PDSCH (or TB or CBG) scheduled up to a specific time point. .

When the UE transmits the PUSCH for the UL grant received in the n-th slot in the (n + k ₀ ) -th slot, the UE detects (or observes) the counter DAI up to the (n + k ₀ -k ₁ ) -th slot and ( The HARQ-ACK payload size can be calculated based on the total DAI (instructed by the UL grant), and the HARQ-ACK can be transmitted to the PUSCH. At this time, k ₀ and k ₁ are non-negative integers, and may have a condition of k ₀ ≧ k ₁ .

The above k ₁ (or k ₂ = k ₀ −k ₁ ) is determined by one of the following methods.

  (1) Value promised in advance

  (2) A value set by the base station by an upper layer signal (eg, RRC signaling) and / or DCI

  (3) (minimum) Value corresponding to UL grant-to-PUSCH time. As an example, when the UE follows the (minimum) UL grant-to-PUSCH time, the UE may transmit the PUSCH for the UL grant received in the nth slot in the (n + k1) th slot.

  (4) Value corresponding to (minimum) UE processing time (for PUSCH transmission)

  (5) Value obtained by adding an additional UE processing time for UCI encoding to (3) or (4) above

Here, UE can be interpreted as indicating (UL indicated by Grant) total DAI is scheduled to _{(n +} k 0 -k ₁₎ th slot (total) number of PDSCH.

The UE is PUSCH transmission time: as (eg n-th slot) relative to the (minimum) UL grant -to-PUSCH time (or (Min) PUSCH processing time (eg: _{m 0)} time corresponding to the previous (Example :( n + _{M 0)} -th HARQ-ACK for PDSCH received after slots) may be excluded from the UCI piggyback object to be transmitted to the PUSCH.

  More specifically, the UE may transmit HARQ-ACK information for one or more PDSCHs on a specific PUSCH as part of the UCI piggyback operation. At this time, in the conventional LTE system, the HARQ-ACK payload size was calculated based on the counter DAI value observed by the UE until the UL grant reception time and the total DAI value indicated by the UL grant. On the other hand, in the NR system to which the present invention can be applied, the base station sets a plurality of UL grant-to-PUSCH time values to the terminal by an upper layer signal such as RRC signaling, and then sets a plurality of UL grant-to-PUSCH time values by DCI (the plurality of UL grant-to -Of the PUSCH values, a specific UL grant-to-PUSCH time can be indicated to apply.

  At this time, the UE may need to transmit HARQ-ACK information for the PDSCH received after the UL grant to the PUSCH scheduled by the UL grant. For this reason, the UE needs to observe the counter DAI not at the UL grant reception time but until the PDSCH reception time at which the HARQ-ACK is to be reported. At this time, when the UE observes the counter DAI (after the UL grant), it must guarantee at least a minimum UL grant-to-PUSCH time. As an example, the UE can observe the counter DAI from the time of transmitting the PUSCH to the time when it is calculated back by the minimum UL grant-to-PUSCH time. At this time, the UE can be interpreted as indicating the number of (all) PDSCHs scheduled until the time when the total DAI (indicated by the UL grant) observes the counter DAI.

  Further, when the counter DAI and the total DAI circulate and use each of the X states repeatedly to represent a specific counter (that is, each n-th term of the sequence where the X states are circulated and repeated is The counter unit represented by each of the counter DAI and the total DAI can be set to have a different count unit (eg, N value). . The count unit of the counter represented by each of the counter DAI and the total DAI can be set according to a scheme promised in advance between the terminal and the base station, or the base station can set the upper layer signal (eg, RRC signaling) and / or DCI. For example, the counter DAI can represent a counter that increases by one as shown in Table 15 below, while the total DAI can represent a counter that increases by two as shown in Table 16 below.

  The above-mentioned twenty-second UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.23. Twenty-third UCI transmission method

  When the UE transmits HARQ-ACK and CSI on the PUSCH, the same RE mapping rule (eg, frequency priority mapping) may be applied for HARQ-ACK and CSI. At this time, the UE performs RE mapping for HARQ-ACK and UCI as follows.

  (1) When performing rate matching for PUSCH for HARQ-ACK transmission

  A. The UE first performs RE mapping for HARQ-ACK, and then continuously performs RE mapping for CSI (from the next RE in the order of RE mapping rules).

  (2) When puncturing PUSCH for HARQ-ACK transmission

  A. After skipping N REs (on the front side in the order of the RE mapping rule), the UE performs RE mapping on CSI (from the (N + 1) th RE).

  i. The UE may utilize the N REs for data transmission.

  ii. If there is a HARQ-ACK to be transmitted to the base station, the UE can perform RE mapping for the HARQ-ACK (based on PUSCH puncturing) (from the first RE in the order of the RE mapping rule). At this time, the number of REs to which the HARQ-ACK is actually transmitted may not be N.

  B. Here, the N value can be calculated according to a scheme promised between the base station and the terminal in advance, or a value set by the base station using an upper layer signal (eg, RRC signaling) and / or DCI.

  As an example, it is assumed that the UE performs RE mapping in a frequency-first manner from a symbol immediately after a PUSCH DM-RS symbol for all of HARQ-ACK and CSI. At this time, if the UE performs rate matching for the PUSCH when transmitting the HARQ-ACK, the base station needs to separately notify the UE of information on the HARQ-ACK payload size. Therefore, the UE can perform RE mapping for CSI after first performing RE mapping for HARQ-ACK.

  FIG. 39 is a diagram simply showing a configuration in which, first, RE mapping for HARQ-ACK is performed on the seven REs on the front side, and then RE mapping is performed on 25 REs for CSI.

  On the other hand, if the UE performs puncturing on the PUSCH when transmitting the HARQ-ACK, the base station may not notify the UE of another HARQ-ACK payload size information. Therefore, when performing UE matching for CSI, the UE can previously reserve N REs on the RE mapping rule in consideration of HARQ-ACK transmission.

  At this time, the N value can be calculated based on the maximum HARQ-ACK payload size that can be transmitted based on PUSCH puncturing.

  FIG. 40 is a diagram simply illustrating an operation of performing RE mapping by leaving a front RE in consideration of HARQ-ACK transmission resources when the UE performs RE mapping for CSI.

  As shown in FIG. 40, the UE can perform RE mapping for data on the vacated RE. Then, if there is a (reporting) HARQ-ACK, the UE may transmit the HARQ-ACK based on puncturing the data, as shown on the left side of FIG. Alternatively, when there is no (reporting) HARQ-ACK, the UE may not transmit the HARQ-ACK, as illustrated on the right side of FIG.

In the following description, an RE mapping rule for a specific UCI means a position and an allocation order of REs to which coded bits (or coded symbols) for the UCI are allocated. If RE of _{k 1} th allocation order according to RE mapping rule is not available for UCI, UE may skip the appropriate RE, the coded bits (or coded symbols)-to RE mapping process for UCI of the next allocation order It is possible to restart from the RE (eg, k ₁ +1).

  Further, when the UE transmits HARQ-ACK and CSI on the PUSCH, the same or different RE mapping rules (eg, distributed REs in time and localized REs in time) may be applied to HARQ-ACK and CSI. At this time, the UE performs RE mapping for HARQ-ACK and UCI as follows.

  1) Assuming X-bit HARQ-ACK payload size

  A. When performing rate matching for PUSCH for HARQ-ACK transmission, the X value is a value indicated by the base station to the UE by DCI and / or higher layer signals.

  B. When performing puncturing on the PUSCH for HARQ-ACK transmission, the X value is a value indicated by the base station to the UE by an upper layer signal or a value promised in advance, or a value indicated by DCI and / or an upper layer signal. At this time, the number of HARQ-ACK bits actually transmitted may be different from the X value.

  2) Calculate the number and location of REs to which HARQ-ACK is allocated based on the X value and the RE mapping rule for HARQ-ACK.

  3) Calculate the number and location of REs to which the CSI is assigned based on the CSI payload size and the RE mapping rules for the CSI (of the remaining REs except the HARQ-ACK RE calculated above). At this time, if the HARQ-ACK RE (calculated above) is assigned to the k-th RE (in the UCI mapping order), the UE skips the CSI mapping in the corresponding RE (in the UCI mapping order) and is the (k + 1) -th. Can attempt CSI mapping for the REs.

  4) If the above is 1) -A (that is, if rate matching is performed on the PUSCH for HARQ-ACK transmission) (of the remaining REs except the calculated HARQ-ACK RE and CSI RE). Calculate the number and location of REs to which data is assigned based on the PUSCH data payload size and RE mapping rules for the data. At this time, when the k-th RE (in the order of data mapping) is allocated as the HARQ-ACK RE or the CSI RE (calculated above), the UE skips data mapping in the corresponding RE (in the order of data mapping). ) Data mapping for the (k + 1) th RE can be attempted.

  5) When the above is 1) -B (that is, when puncturing the PUSCH for HARQ-ACK transmission), the PUSCH data payload size (of the remaining REs excluding the calculated CSI RE) and Calculate the number and location of REs to which data has been assigned based on the RE mapping rules for the data. At this time, if the k-th RE (in the order of data mapping) is allocated as the CSI RE (calculated above), the UE skips the data mapping in the corresponding RE (in the order of data mapping) and (k + 1) -th. Can attempt data mapping to the REs of the.

  6) Thereafter, for HARQ-ACK or CSI or data, coded bits are generated according to the calculated RE number, and then allocated to the calculated RE position and transmitted.

  Here, when the UE calculates the RE that can transmit HARQ-ACK and the RE that can transmit CSI based on the RE mapping rule for each of HARQ-ACK and CSI (without excluding a specific RE in advance), HARQ -Some of the REs capable of transmitting ACK and the transmitting REs capable of CSI may overlap each other (in terms of time / frequency resources).

  In the following description, DCI format 0_0 means a DCI format corresponding to fallback DCI of the UL grant DCI format for scheduling the PUSCH, and DCI format 0_1 is a non-grant DCI format of the UL grant DCI format for scheduling the PUSCH. A DCI format corresponding to the fallback DCI. However, when the UL grant is the fallback DCI, the UL DAI information in the UL grant may not exist.

  In the following description, Counter DAI indicates the number of PDSCHs (or the number of TBs or the number of HARQ-ACK bits) accumulated up to the corresponding DL assignment, and UL DAI indicates the total number of PDSCHs (or the number of TBs) to be UCI piggybacked in the PUSCH. Or HARQ-ACK bit number).

  Also, in the following description, the quasi-static HARQ-ACK codebook means a case where the HARQ-ACK payload size reported by the UE is quasi-statically set by a (UE-specific) upper layer signal, and is referred to as a dynamic HARQ-ACK. The ACK codebook means that the HARQ-ACK payload size reported by the UE can be dynamically changed by DCI or the like.

  Also, in the following description, the beta offset value means a design variable used when calculating the number of REs (or the number of modulation symbols) for transmitting UCI at the time of UCI piggyback to PUSCH for a specific UCI. Thus, the base station can indicate the beta offset value to the UE by higher layer signals (UE specific) and / or DCI. For example, the beta offset value may mean a ratio (c_1 / c_2) between a coding rate (c_1) for data and a coding rate (c_2) applied to UCI.

  In the following description, floor (X) means a round-down operation on X, and ceiling (X) means a round-up operation on X.

  Further, when the UE transmits the HARQ-ACK and CSI to the PUSCH by UCI piggybacking, the same or different RE mapping rules may be applied to the HARQ-ACK and the CSI. At this time, the UE can perform RE mapping for HARQ-ACK and UCI as follows.

  [1] Assuming X-bit HARQ-ACK payload size. For HARQ-ACK transmission, when performing rate matching for PUSCH (or when HARQ-ACK bits are larger than 2 bits) or when performing puncturing (or when HARQ-ACK bits are 2 bits or less), X The bits are determined in one or more of the following ways.

  i. Opt. 1: A value set by the base station to the UE by an upper layer signal (UE specific). As an example, Opt. 1 is applicable when the UL DAI does not exist in the UL grant (eg, fallback DCI) and a quasi-static HARQ-ACK codebook is set.

  ii. Opt. 2: Value calculated based on Counter DAI in DL assignment transmitted from the base station to the UE. As an example, Opt. No. 2 is applicable when the UL DAI does not exist in the UL grant (eg, fallback DCI) and a dynamic HARQ-ACK codebook is set.

  iii. Opt. 3: A value set by the base station to the UE by an upper layer signal (UE specific) and / or a value calculated by the UL DAI in the UL grant. As an example, Opt. 3 is applicable when the UL DAI exists in the UL grant (eg, non-fallback DCI) and a semi-static HARQ-ACK codebook is set.

  iv. Opt. 4: Value calculated by Counter DAI in DL assignment and / or UL DAI in UL grant transmitted from the base station to the UE. As an example, Opt. 4 is applicable when a UL DAI exists in the UL grant (eg, non-fallback DCI) and a dynamic HARQ-ACK codebook is set.

  v. Opt. 5: Value promised in advance between the base station and the terminal. As an example, Opt. 5 indicates that there is no UL DAI in the UL grant (eg, fallback DCI), the HARQ-ACK codebook type is not set by a (UE-specific) upper layer signal, or for HARQ-ACK transmission. This is applicable when puncturing is performed on the PUSCH (when the HARQ-ACK bit is 2 bits or less).

  vi. Here, the X value may be different from the number of HARQ-ACK bits actually transmitted.

  vii. As illustrated, depending on the presence or absence of UL DAI in the UL grant and / or the HARQ-ACK codebook type (e.g., quasi-static / dynamic), the UE may select the Opt. One of 1/2/3/4/5 can be selectively applied.

  [2] Calculate (reserved) RE number for HARQ-ACK transmission. The UE calculates the number of HARQ-ACK REs in one of the following ways.

  i. Opt. 1: The RE number is calculated based on the beta offset value promised between the base station and the UE (or set by the upper layer signal) and the value X of the HARQ-ACK bit number. As an example, Opt. 1 is applicable when a beta offset indicator (Beta-offset indicator) does not exist in the UL grant (eg, fallback DCI).

  ii. Opt. 2: The RE number is calculated based on the beta offset value derived from the upper layer signal (UE specific) and / or DCI (eg, UL grant) and the value X of the HARQ-ACK bit number. As an example, Opt. 2 is applicable when there is a beta offset indicator in the UL grant (eg, non-fallback DCI).

  iii. Here, the UE determines the Opt. Depending on the presence or absence of the beta offset indicator in the UL grant. One of the halves can be selectively applied.

  [3] Based on the calculated (reserved) RE number, the location of the (reserved) RE for HARQ-ACK transmission (hereinafter, HARQ-ACK RE) is calculated according to the RE mapping rule for HARQ-ACK.

  A. Here, the location of the HARQ-ACK RE is determined in the same manner regardless of whether the UE performs rate matching for the PUSCH or puncturing for the PUSCH for HARQ-ACK transmission.

  B. As an example, the UE may calculate the location of the HARQ-ACK RE as reserved.

  i. When frequency hopping is applied to the PUSCH and the number of modulation symbols of the entire HARQ-ACK is N, the UE transmits floor (N / 2) symbols on the first frequency hop and the remaining ceil (n) / 2) symbols transmitted on second frequency hop

  A. Here, the RE mapping rule applied per frequency hop is set the same.

  B. Also, from the viewpoint of the encoded UCI bits, the UE divides the entire encoded UCI bits for two frequency hops (with the granularity of the number of encoded bits that can be transmitted per RE), and generates each divided code. The UCI bits can be RE mapped for each frequency hop.

  ii. The RE mapping of the time axis (per each frequency hop) is as follows. Specifically, the UE performs UCI mapping in an available subcarrier in which the UCI mapping in the same OFDM symbol is available in a frequency-first mapping (eg, Frequency-first time-second mapping) scheme and performs UCI mapping in the next symbol. It can be moved to perform RE mapping.

  iii. RE mapping of the frequency axis (per OFDM symbol) follows one of the following schemes.

  1. In the following description, the following definitions will be used.

  A. M (k): the number of REs (or the number of coded bits that can be transmitted) that can be used for RE mapping for HARQ-ACK in the k-th OFDM symbol

  B. N (k): the number of modulation symbols for HARQ-ACK that are not RE-mapped before the k-th OFDM symbol (or the number of remaining HARQ-ACK coded bits)

  2. Opt. 1: When performing RE mapping for a specific UCI type in the k-th OFDM symbol, the UE assigns a modulation symbol for HARQ-ACK (for REs that can be used for HARQ-ACK transmission in the corresponding symbol) to: RE mapping can be performed in a distributed manner with a determined distance d (in the frequency axis) between adjacent REs.

[Equation 6]
d = floor (M (k) / N (k))

  3. Opt. 2: When performing RE mapping for a specific UCI type in the k-th OFDM symbol, the UE (for REs available for HARQ-ACK transmission in the corresponding symbol) among modulation symbols for HARQ-ACK , N (k), the modulation symbol to be assigned to the n-th (eg, n = 0, 1,..., N (k)) in the corresponding OFDM symbol is determined by (virtual) RE index p (n). ) Allows RE mapping.

[Equation 7]
p (n) = floor (n * M (k) / N (k)) (or ceil (n * M (k) / N (k)))

  [4] Calculate the number and position of REs for CSI transmission (hereinafter, CSI RE) based on the CSI payload size and the RE mapping rule for CSI (of the remaining REs except for the calculated HARQ-ACK RE).

  A. If the HARQ-ACK RE (calculated above) is assigned to the k-th RE (in the UCI mapping order), the UE skips the CSI mapping in the corresponding RE, and the (k + 1) -th RE (in the UCI mapping order). Can be attempted for CSI mapping.

  B. However, when puncturing the PUSCH for HARQ-ACK transmission (or when the HARQ-ACK bit is 2 bits or less), the UE transmits HARQ-ACK for at least one of the following cases. CSI mapping can be performed assuming no (or not valid) RE.

  i. Case 1: When there is no UL-SCH transmission in the PUSCH (that is, when the PUSCH is a UCI only PUSCH). For example, in the case of PUSCH with UL-SCH, the UE may calculate (reserved) RE for HARQ-ACK transmission and avoid RE mapping for the corresponding RE in the CSI mapping process. Alternatively, in the case of PUSCH with UL-SCH, the UE may perform CSI mapping assuming that there is no (reserved) RE for HARQ-ACK transmission.

  ii. Case 2: There is no UL-SCH transmission in the PUSCH, and there is no CSI part (eg, CSI part 2) to be transmitted on the PUSCH (that is, a PUSCH including only UCI). As an example, when the PUSCH with UL-SCH is used and only HARQ-ACK and CSI part 1 are transmitted by UCI piggybacking in the PUSCH and the UE transmits the HARQ-ACK (reserved) RE for the mapping of the CSI part 1 Assuming that does not exist (or is not valid), RE mapping can be performed. Alternatively, when transmitting HARQ-ACK, CSI part 1 and CSI part 2 by UCI piggybacking in the PUSCH and transmitting the CSI part 1, the UE transmits the CSI part 1 RE to the RE for the HARQ-ACK transmission (reserved). Mapping can be avoided.

  iii. Case 3: Indication of no HARQ-ACK (UCI piggybacked) by (upper layer signal and / or) DCI (eg UL grant)

  C. However, when puncturing the PUSCH for HARQ-ACK transmission (or when the HARQ-ACK bit is 2 bits or less), there is a (reserved) RE for HARQ-ACK transmission, but the actual transmission is performed. There may be no HARQ-ACK bit to perform. At this time, the UE configures all HARQ-ACK payloads corresponding to (reserved) REs for HARQ-ACK transmission with NACKs (All NACKs) (reserved) and satisfies the HARQ-ACK modulation symbols of the HARQ-ACKs in the RE. be able to.

  [5] When performing rate matching for the PUSCH for HARQ-ACK transmission (or when the HARQ-ACK bit is greater than 2 bits), (remaining REs except for the HARQ-ACK RE and CSI RE calculated above). Calculate the number and location of REs to which data is allocated based on the PUSCH data payload size and the RE mapping rule for the data. At this time, if the k-th RE (in the data mapping order) is assigned as the HARQ-ACK RE or the CSI RE (calculated above), the UE skips the data mapping in the corresponding RE (in the data mapping order) ( Data mapping for the (k + 1) th RE can be attempted.

  [6] When puncturing the PUSCH for HARQ-ACK transmission (or when the HARQ-ACK bit is 2 bits or less), PUSCH data (of the remaining REs excluding the calculated CSI RE) Calculate the number and location of REs to which data is assigned based on the RE mapping rules for payload size and data. At this time, if the k-th RE (in the data mapping order) is allocated as the CSI RE (calculated above), the UE skips data mapping in the corresponding RE (in the data mapping order) and the (k + 1) -th RE. You can try data mapping for.

  [7] Then, after generating coded bits according to the above calculated RE number for HARQ-ACK or CSI or data, it is allocated to the calculated RE position and transmitted.

  Here, when the UE calculates the RE that can transmit HARQ-ACK and the RE that can transmit CSI according to the RE mapping rule for each of HARQ-ACK and CSI (without excluding a specific RE in advance), HARQ-ACK May be superimposed on each other (in terms of time / frequency resources).

  Also, when performing rate matching for PUSCH for HARQ-ACK transmission (or when HARQ-ACK bits are larger than 2 bits), CSI is divided into CSI part 1 and CSI part 2. At this time, the method of [4] above is applied when CSI mapping of (reserved) RE for HARQ-ACK transmission is performed for CSI part 1, and (reserved) RE for HARQ-ACK transmission is performed for CSI part 2. May not be reflected in the CSI mapping (ie, it can be assumed that there is no RE reserved for HARQ-ACK transmission for CSI part 2).

  Also, when performing UE UCI piggybacking, RE indexing applying the RE mapping rule for UCI may follow RE indexing for VRB (virtual resource block) allocated to PUSCH. That is, the RE mapping rule for UCI is defined in the VRB area allocated for PUSCH. Thereafter, the location of the UCI RE which is actually physically allocated differs according to a VRB-to-PRB (physical resource block). For example, the UE may perform the UCI RE mapping on the VRB allocated to the PUSCH, and then apply interleaving on the UCI RE and the data RE in a VRB-to-PRB process.

  Further, when the UE transmits the HARQ-ACK on the PUSCH by UCI piggybacking, the UE may determine the HARQ-ACK payload (or HARQ-ACK codebook) size (reported by the UE) as follows. it can.

  At this time, in the case of a quasi-static HARQ-ACK codebook set in the UE, the fact that the UL DAI value (within the UL grant) is 0 indicates that the HARQ-ACK bit is 2 bits or less. (I.e., the HARQ-ACK bit is one of 0, 1, and 2), and the UL DAI value of 1 indicates that the HARQ-ACK codebook is about the same size as the HARQ-ACK codebook. Indicates that there is an ACK bit.

  The following specific configuration can be used in the process of calculating the number of HARQ-ACK bits assumed to determine the number of (reserved) REs for HARQ-ACK transmission described above.

  1] When the HARQ-ACK codebook is a quasi-static codebook

  A. When 1 bit UL DAI = bit “0”

  i. Opt. 1: A HARQ-ACK of 2 bits or less corresponding to a scheduled PDSCH is transmitted by performing UCI piggyback in the PUSCH based on puncturing for the PUSCH.

  1. At this time, the UE may assume that the payload size of the maximum HARQ-ACK is 2 bits.

  2. Also, the (entire) HARQ-ACK bit configuration is arranged such that the lower the CC (component carrier) index and the faster the slot index for the same CC index, the earlier (or the later) on the bit sequence. can do.

  ii. Opt. 2: Regardless of the presence or absence of a scheduled PDSCH, a 2-bit HARQ-ACK is always assumed, and the HARQ-ACK is UCI piggybacked in the PUSCH based on puncturing for the PUSCH and transmitted. At this time, the HARQ-ACK bit having no received PDSCH is considered as NACK.

  B. When 1 bit UL DAI = bit “1”

  i. The HARQ-ACK corresponding to the payload size of the (set) maximum HARQ-ACK is transmitted by UCI piggybacking in the PUSCH.

  1. In this case, the configuration of the (overall) HARQ-ACK bit is such that the lower the CC (component carrier) index and the earlier the slot index for the same CC index, the earlier (or the later) on the bit sequence. (CC first-slot second scheme).

  2. If the (set) maximum HARQ-ACK payload size is 2 bits or less, the UE can perform UCI piggyback based on puncturing for the PUSCH. On the other hand, when the payload size of the maximum HARQ-ACK exceeds 2 bits, the UE can perform UCI piggyback based on rate matching for the PUSCH. Or, the UE can always perform UCI piggyback based on rate matching for PUSCH (regardless of the maximum HARQ-ACK payload size).

  C. The case of SPS PUSCH is the same as the case of 1-bit UL DAI = 0. At this time, the UE can always assume 2-bit HARQ-ACK regardless of the presence or absence of the scheduled PDSCH.

  D. When the PUSCH is scheduled in the DCI format 0_0, it is the same as when 1-bit UL DAI = 1.

  2] When the HARQ-ACK codebook is a dynamic codebook

  A. When 2-bit UL DAI ≦ (total) 2 (that is, when UL DAI indicates HARQ-ACK bit of 2 bits or less)

  i. HARQ-ACK of 2 bits or less corresponding to the corresponding UL DAI is UCI piggybacked in the PUSCH based on puncturing for the PUSCH and transmitted. At this time, the (entire) HARQ-ACK bit configuration is configured in an ascending (or descending) order (on a bit sequence) according to the order of the counter-DAI values.

  B. When 2-bit UL DAI> (total) 2 (that is, when UL DAI indicates HARQ-ACK bits exceeding 2 bits)

  i. A HARQ-ACK exceeding 2 bits corresponding to the corresponding UL DAI is piggybacked in the PUSCH based on rate matching for the PUSCH and transmitted. At this time, the configuration of the (overall) HARQ-ACK bit is performed in ascending order (or descending order) (on a bit sequence) according to the order of the counter-DAI values.

  C. In case of SPS PUSCH

  i. Opt. 1: A HARQ-ACK of 2 bits or less corresponding to a scheduled PDSCH is transmitted by performing UCI piggyback in the PUSCH based on puncturing for the PUSCH.

  1. At this time, the UE may assume that the maximum HARQ-ACK payload size is 2 bits.

  2. The (whole) HARQ-ACK bit configuration can be configured in ascending (or descending) order (on a bit sequence) according to the order of the counter-DAI values.

  ii. Opt. 2: Assuming 2-bit HARQ-ACK regardless of the presence or absence of scheduled PDSCH

  D. If the PUSCH is scheduled in DCI format 0_0,

  i. The HARQ-ACK corresponding to the payload size of the (set) maximum HARQ-ACK is transmitted by UCI piggybacking in the PUSCH.

  1. At this time, the bit configuration of the (overall) HARQ-ACK is configured in an ascending (or descending) order (on a bit sequence) according to the order of the counter-DAI values.

  2. If the (set) maximum HARQ-ACK payload size is 2 bits or less, the UE can perform UCI piggyback based on puncturing for the PUSCH. On the other hand, when the payload size of the maximum HARQ-ACK exceeds 2 bits, the UE can perform UCI piggyback based on rate matching for the PUSCH. Or, the UE can always perform UCI piggyback based on rate matching for PUSCH (regardless of the maximum HARQ-ACK payload size).

  Further, when the UE transmits the HARQ-ACK to the PUSCH by piggybacking the UCI, two HARQ-ACK codebooks (eg, subcodebook A and subcodebook B) are configured and a single (UL) code in the UL grant is set. Only 2 bits) UL DAI can be present. At this time, the UE can apply a single UL DAI (field) to the two HARQ-ACK codebooks in common.

  As an example, two Counter DAIs (eg, Counter DAI A, respectively) corresponding to each of the two HARQ-ACK codebooks (eg, subcodebook A, subcodebook B) in DL assignment (or DL scheduling DCI). Counter DAI B), the HARQ-ACK payload size (or sub-codebook size) for sub-codebook A is calculated from Counter DAI A and UL DAI, and HARQ-ACK payload size for sub-codebook B (or The sub-codebook size can be calculated from Counter DAI B and UL DAI.

  Also, the UE receives the last PDSCH schedule order value of 2 or 3 for sub-codebook A (by DL assignment (or DL scheduling DCI)) and the last PDSCH schedule order value of 6 or 7 for sub-codebook B. If the total value of the PDSCH schedule is indicated as 3 or 7 by a single UL DAI field in a state where the UE receives the HARQ-ACK payload size (or subcodebook size) for subcodebook A, In this case, the calculation is performed by applying total = 3, and in the case of the HARQ-ACK payload size (or the size of the sub-codebook) for the sub-codebook B, the calculation is performed by applying total = 7.

  The above-mentioned twenty-third UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  3.24. Twenty-fourth UCI transmission method

  In the following description, the base station can set a transmission resource and a transmission cycle for the PUSCH in advance by an upper layer signal, and instruct activation (Release) or activation (Release) by DCI. As an example, when activation (Activation) is instructed by DCI, the UE performs PUSCH transmission according to a transmission resource and a transmission cycle. As another example, when release is instructed by DCI, the UE stops PUSCH transmission. Hereinafter, a PUSCH transmitted in such a scheme is referred to as an SPS (semi-persistent scheduling) PUSCH.

  When the UE performs UCI piggyback for a specific UCI on the SPS PUSCH, the base station provides the following information to the UE by DCI that activates the SPS PUSCH.

  (1) (UCI piggyback target) UCI payload size for UCI

  (2) (for UCI piggyback) Beta offset value for UCI

  (3) Rate matching / puncturing information for PUSCH (example: rate matching or puncturing target resource amount)

  Here, the beta offset value refers to a design value used for calculating the number of coded symbols or the number of REs for performing UCI mapping in the PUSCH.

  Also, the above configuration can be applied to an SPS PUSCH (for Semi-persistent CSI transmission) in addition to the SPS PUSCH (for UL-SCH transmission such as VoIP).

  More specifically, when the UE performs the UCI piggyback on the SPS PUSCH, the UE may be instructed by the activation DCI about the UCI payload size of the UCI piggyback target. Thereafter, the UE performs rate matching or puncturing on the PUSCH based on the UCI payload size indicated by DCI.

  In the NR system to which the present invention can be applied, a dynamic beta-offset indication method of indicating a beta offset value by DCI is applied. Therefore, it is preferable that the base station also indicates the beta offset value applied for UCI piggyback to the corresponding SPS PUSCH by the activation DCI for the SPS PUSCH.

  In this manner, the operation of providing UCI piggyback-related information (eg, UCI payload size or beta offset value, etc.) by the activated DCI is performed when the base station transmits UCI piggyback-related information (eg, UCI payload size or There is an advantage that the number of UCI mapping REs can be adjusted relatively quickly compared to the case where a beta offset value is set quasi-statically. This allows the base station to support more efficient UCI piggyback.

  Further, when the base station sets a beta offset to be applied at the time of transmitting the SPS PUSCH using an upper layer signal, the beta offset can be set as follows.

  1) Opt. 1: Set a single beta offset for SPS PUSCH

  -The setting of the beta offset is similarly used when the SPS PUSCH transmits UL-SCH (eg, VoIP) and when it transmits only UCI (eg, SP-CSI).

  2) Opt. 2: Set beta offset for each application for SPS PUSCH

  For example, different beta offsets can be set when the SPS PUSCH transmits the UL-SCH (eg, VoIP) and when it transmits only the UCI (eg, SP-CSI).

  The above-mentioned twenty-fourth UCI transmission method can be applied in combination with other proposals of the present invention unless they conflict with each other.

  3.25. Twenty-fifth UCI transmission method

  In the following description, it is assumed that CSI (channel state information) can be divided into CSI part 1 and CSI part 2. At this time, CSI part 1 includes information such as RI (rank indicator) and CQI (channel quality information) (for the first transport block), and CSI part 2 includes other CSI information. At this time, the UCI payload size for CSI part 1 is fixed, and the UCI payload size for CSI part 2 can be changed to information in CSI part 1.

  When the UE performs UCI piggyback on PUSCH for HARQ-ACK and CSI, the UE may perform RE mapping in a frequency-first mapping scheme according to resources and rules defined as follows.

  (1) (UCI mapping target) time resource (symbol)

  A. Opt. 1: All OFDM symbols except for DM-RS transmission symbols in PUSCH

  B. Opt. 2: OFDM symbol set by base station in PUSCH (by upper layer signal)

  (2) (UCI mapping target) frequency resource (subcarrier)

  A. Opt. 1: All subcarriers (excluding PT-RS transmission symbols) in PUSCH

  B. Opt. 2: Subcarrier set by base station in PUSCH (by upper layer signal)

  (3) (UCI mapping target) UCI mapping order between time resources

  A. Opt. 1: The order previously promised to the base station and the terminal according to the DM-RS pattern in the PUSCH and the PUSCH duration (= the number of OFDM symbols in the PUSCH)

  i. Opt. 1-A: Ascending order (or descending order) based on the time axis resource index (OFDM symbol index)

  ii. Opt. 1-B: An order based on a priority order based on a distance from the DM-RS. At this time, the priority is determined by the following rules.

  A. The shorter the minimum distance between the specific symbol and the (arbitrary) DM-RS symbol, the higher the priority.

  B. The smaller the OFDM symbol index (within a slot) of a particular symbol, the higher the priority

  B. Opt. 2: Order set by base station (by upper layer signal)

  (4) (UCI mapping target) UCI mapping order for frequency resources in time resources

  A. Opt. 1: Ascending order (or descending order) based on frequency index (subcarrier index)

  B. Opt. 2: Order between subcarriers to which cluster-based permutation is applied

  i. All subcarrier resources in the PUSCH are composed of N clusters. Here, each cluster is composed of continuous subcarriers and has a cluster index in ascending (or descending) order based on the frequency axis.

  ii. The UCI mapping order among the N clusters follows a specific order, and is determined as follows as an example.

1. Opt. 2-A: If N = ^2M , follow the order of bit reversal permutation for ^2M length.

  2. Opt. 2-B: When N = 4, [0 1 2 3], [0 2 1 3], [0 3 1 2], [1 3 0 2], and [0 3 2 1] from the viewpoint of the cluster index. ] Are followed.

  3. Opt. 2-C: For (arbitrary) N, the order of 0, N-1, 1, N-2,... K, (N-1) -k,.

  iii. The UCI mapping order between the subcarriers in the cluster follows the ascending (or descending) order based on the subcarrier index.

  (5) UCI mapping order between UCI types (eg, HARQ-ACK-> CSI part 1-> CSI part 2)

  i. The UE may skip the UCI mapping for REs to which other UCI types are pre-assigned.

  ii. The order between the time resources of interest (UCI mapping) may differ for each UCI type.

  iii. (UCI mapping target) The time resource can have a virtual time index according to the UCI mapping order, and the offset value for the virtual time index for starting the UCI mapping for each UCI type is set to be different. Can be.

  Here, the frequency priority mapping means that the UE performs UCI mapping on all frequency resources (for UCI mapping) in a specific time resource (for UCI mapping), and then moves to a time resource in the next UCI mapping order. The UCI mapping process.

  The base station can set the number of clusters or the number of subcarriers in the cluster (that is, the frequency axis size of the cluster) to the UE by an upper layer signal.

  More specifically, for the PUSCH, the time resource (for UCI mapping) is defined as all OFDM symbols except for the DM-RS transmission symbols in the PUSCH, and the frequency resource (for UCI mapping) is the PT-RS in the PUSCH. It can be defined as all sub-carriers excluding transmission symbols. (UCI mapping target) The UCI mapping order between symbols follows the ascending order of the symbol index, and the (UCI mapping target) UCI mapping order for frequency resources in the symbol is the order between subcarriers to which cluster-based permutation is applied. Can be followed.

  Specifically, Opt. When 2-C is applied, the UCI mapping order between UCI types follows the order of HARQ-ACK-> CSI part 1-> CSI part 2, and RE mapping for data is performed last.

  FIG. 41 is a diagram simply illustrating a configuration in which the UE performs UCI mapping in the order of HARQ-ACK-> CSI part 1-> CSI part 2-> data. In FIG. 41, the number in each RE (resource element) means the RE mapping order for UCI or the RE mapping order for data (UL-SCH).

  The UCI mapping order between (UCI mapping target) symbols follows the order promised between the base station and the terminal based on the DM-RS pattern in the PUSCH and the PUSCH duration (= the number of OFDM symbols in the PUSCH). As an example, the UCI mapping order between symbols may follow a priority order based on a relative distance from the DM-RS. At this time, the priority is higher as the minimum distance between the specific symbol and the (arbitrary) DM-RS symbol is shorter. ) It is set such that the smaller the OFDM symbol index (within the slot), the higher the priority.

  FIG. 42 is a diagram simply illustrating a UCI mapping configuration when the PUSCH length is 12 OFDM symbols and DM-RS symbols exist in OFDM symbol indexes # 2 and # 11, respectively. As shown in FIG. 42, the UCI mapping order between (UCI mapping target) symbols is 3, 10, 12, 4, 9, 13, 5, 8, 6, and 7 in terms of the OFDM symbol index. .

  Further, when frequency hopping is applied to the PUSCH, the coded bits can be divided into two parts (eg, UCI part 1 and UCI part 2) for each UCI type. At this time, the UE performs UCI-to-RE mapping of UCI part 1 for the first frequency hop, and performs UCI-to-RE mapping of UCI part 2 for the second frequency hop. At this time, UCI part 1 and UCI part 2 are divided as follows.

  1) Opt. 1: The number of OFDM symbols (for UCI mapping) in the first frequency hop of the PUSCH (or the number of REs for UCI mapping) and the number of OFDM symbols (for UCI mapping) in the second frequency hop (or for UCI mapping) RE number) and UCI part 1 and UCI part 2 so that the ratio of UCI part 1 and UCI part 2 (in terms of the number of coding bits) is the same (maximum / as much as possible) Method

  2) Opt. 2: The number of UL data (UL-SCH) transmission OFDM symbols (or the number of REs) remaining after performing PUSCH rate matching (or puncturing) (with respect to UCI part 1) in the first frequency hop of the PUSCH; The number of UL data (UL-SCH) transmitted OFDM symbols (or REs) remaining after performing PUSCH rate matching (or puncturing) (for UCI part 2) in the th frequency hop is (maximum / as much as possible) A) Separating UCI Part 1 and UCI Part 2 so that they are identical (in terms of number of coded bits)

  Here, a unified RE mapping rule (Unified RE mapping rule) for the two frequency hops may be applied. In other words, the scheme in which UCI part 1 is RE-mapped for the first frequency hopping may be the same as the scheme in which UCI part 2 is RE-mapped for the second frequency hopping.

  Here, the OFDM symbol in the frequency hop (to be subjected to UCI mapping) may mean all the symbols in the frequency hop or only the UCI transmission symbol (excluding the DMRS symbol).

  More specifically, when frequency hopping is applied to the PUSCH, the UE divides the coded bits for each UCI type into two parts (eg, UCI part 1 and UCI part 2), and performs the first frequency hopping. UCI-to-RE mapping of UCI part 1 and UCI part 2 UCI-to-RE mapping of the second frequency hop (by the same RE mapping rule as UCI part 1).

  However, in the NR system to which the present invention can be applied, the number of OFDM symbols (or the number of REs) for which UCI mapping can be performed differs for each frequency hop in the PUSCH. Therefore, when the UE separates the UCI part 1 and the UCI part 2, it is preferable that the UE separates the UCI part 1 and the UCI part 2 according to the ratio of the number of available REs for each frequency hop in the PUSCH. When frequency hopping is applied to the PUSCH, the UE can separate the two parts of the UCI part according to the symbol ratio for each hop. In the above, a symbol may mean all symbols in a hop or only UCI transmission symbols (excluding DMRS symbols).

  In the following description, the cluster-based RE mapping rule is that when the UE performs RE mapping in one OFDM symbol, all frequency resources are divided into a plurality of clusters (in a previously promised or configured order). This means an operation of mapping one UCI RE for each cluster alternately and mapping REs to UCIs for each cluster in ascending or descending order of the frequency resource index in the corresponding cluster (for example, the 25th UCI RE described above). Configuration corresponding to (4) of transmission method).

  Further, when the UE performs UCI transmission on the PUSCH, the UE may perform UCI mapping (with or without PUSCH puncturing or PUSCH rate matching for HARQ-ACK transmission) as follows. Here, it is assumed that PUSCH rate matching is applied for CSI transmission.

  [1] Case 1: PUSCH puncturing (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule for HARQ-ACK, CSI Part 1, CSI Part 2

  1. Here, the same RE mapping rule is a cluster-based RE mapping rule.

  2. Also, the RE mapping can be a frequency-first mapping scheme, where (from the next symbol of the first DM-RS symbol in a slot or each frequency hop) the ascending symbol index (for the UCI mapped symbol). Will be

  B. Starting position of RE mapping (for each UCI type)

  i. For the CSI part 1, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule based on the (single) RE mapping rule.

  ii. RE mapping with the (single) RE mapping rule with the next (UCI mapping) order of the last RE assigned for CSI part 1 relative to the (single) RE mapping rule for CSI part 2 I do.

  iii. RE to (single) RE mapping rule with next (UCI mapping) order of the last RE assigned for CSI part 2 with respect to (single) RE mapping rule for HARQ-ACK I do.

  [2] Case 2: PUSCH rate matching (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule for HARQ-ACK, CSI Part 1, CSI Part 2

  1. Here, the same RE mapping rule is a cluster-based RE mapping rule.

  2. Also, the RE mapping can be a frequency-first mapping scheme, where (from the next symbol of the first DM-RS symbol in a slot or each frequency hop) the ascending symbol index (for the UCI mapped symbol). Will be

  B. Starting position of RE mapping (for each UCI type)

  i. For HARQ-ACK, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule based on the (single) RE mapping rule.

  ii. RE mapping with the (single) RE mapping rule with the next (UCI mapping) order of the last RE assigned for HARQ-ACK relative to the (single) RE mapping rule for CSI part 1 I do.

  iii. RE mapping with the (single) RE mapping rule with the next (UCI mapping) order of the last RE assigned for CSI part 1 relative to the (single) RE mapping rule for CSI part 2 I do.

  Here, the HARQ-ACK can be transmitted by puncturing the UL-SCH region in the PUSCH.

  In addition, (OFDM) symbols for transmitting DM-RSs can be excluded from symbols to be subjected to UCI mapping.

  FIGS. 43 and 44 are diagrams schematically illustrating an example in which PUSCH puncturing or rate matching is applied for HARQ-ACK.

  FIG. 43 shows an example of the above-described case 1, and FIG. 44 shows an example of the above-described case 2.

  Further, when the UE performs UCI transmission on the PUSCH, the UE may perform UCI mapping (with or without PUSCH puncturing or PUSCH rate matching for HARQ-ACK transmission) as follows. At this time, it is assumed that PUSCH rate matching is applied for CSI transmission.

  1] Case 3: PUSCH puncturing (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule for HARQ-ACK, CSI Part 1, CSI Part 2

  1. Here, the same RE mapping rule is a cluster-based RE mapping rule.

  2. Also, the RE mapping can be a frequency-first mapping scheme, where (from the next symbol of the first DM-RS symbol in a slot or each frequency hop) the ascending symbol index (for the UCI mapped symbol). Will be

  B. Starting position of RE mapping (for each UCI type)

  i. For the CSI part 1, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule based on the (single) RE mapping rule.

  ii. RE to RE (single) RE mapping rule with next (UCI mapping) order of last RE assigned for CSI Part 1 with respect to (single) RE mapping rule for HARQ-ACK I do.

  iii. RE mapping according to (single) RE mapping rule with next (UCI mapping) order of last RE assigned for HARQ-ACK relative to (single) RE mapping rule for CSI part 2 I do.

  2] Case 4: PUSCH rate matching (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule for HARQ-ACK, CSI Part 1, CSI Part 2

  1. Here, the same RE mapping rule is a cluster-based RE mapping rule.

  2. Also, the RE mapping can be a frequency-first mapping scheme, where (from the next symbol of the first DM-RS symbol in a slot or each frequency hop) the ascending symbol index (for the UCI mapped symbol). Will be

  B. Starting position of RE mapping (for each UCI type)

  i. For the CSI part 1, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule based on the (single) RE mapping rule.

  ii. RE to RE (single) RE mapping rule with next (UCI mapping) order of last RE assigned for CSI Part 1 with respect to (single) RE mapping rule for HARQ-ACK I do.

  iii. RE mapping according to (single) RE mapping rule with next (UCI mapping) order of last RE assigned for HARQ-ACK relative to (single) RE mapping rule for CSI part 2 I do.

  Here, the HARQ-ACK can be transmitted by puncturing the UL-SCH region in the PUSCH.

  Also, (OFDM) symbols for transmitting DM-RSs can be excluded from UCI mapping target symbols.

  FIGS. 45 and 46 are diagrams simply illustrating another example in which PUSCH puncturing or rate matching is applied for HARQ-ACK.

  FIG. 45 shows an example of the above-described case 3, and FIG. 46 shows an example of the above-described case 4.

  Further, when the UE performs UCI transmission on the PUSCH, the UE may perform UCI mapping (with or without PUSCH puncturing or PUSCH rate matching for HARQ-ACK transmission) as follows. At this time, it is assumed that PUSCH rate matching is applied for CSI transmission.

  <1> Case 5: PUSCH puncturing / rate matching (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule A for HARQ-ACK, CSI Part 1

  1. Here, the RE mapping rule A is a cluster-based RE mapping rule.

  2. Also, the RE mapping can be a frequency-first mapping scheme, where (from the next symbol of the first DM-RS symbol in a slot or each frequency hop) the ascending symbol index (for the UCI mapped symbol). Will be

  ii. Apply (single) RE mapping rule B for CSI part 2

  1. Here, RE mapping rule B is a cluster-based RE mapping rule. Here, the (relative) UCI mapping order between REs in the cluster is the reverse order of RE mapping rule A.

  2. Also, the RE mapping can be a frequency-first mapping scheme, and is performed in descending order of symbol index (from the last symbol in the slot or frequency hop) (for the UCI mapping target symbol) (ie, RE mapping rule A). Is the reverse order on the time axis).

  B. Starting position of RE mapping (for each UCI type)

  i. With respect to the CSI part 1, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule A based on the (single) RE mapping rule A.

  ii. According to the (single) RE mapping rule A from the RE with the next (UCI mapping) order of the last RE assigned for CSI part 1 with respect to the (single) RE mapping rule A for HARQ-ACK Perform RE mapping.

  iii. With respect to the CSI part 2, the RE having the first UCI mapping order is mapped to the (single) RE mapping rule B with respect to the (single) RE mapping rule B.

  Here, the HARQ-ACK can be transmitted by puncturing a UL-SCH region and / or a CSI transmission region (eg, CSI part 2) in the PUSCH.

  Further, (OFDM) symbols for transmitting the DM-RS can be excluded from symbols to be subjected to UCI mapping.

  FIG. 47 is a diagram schematically illustrating another example in which PUSCH puncturing or rate matching is applied for HARQ-ACK.

  FIG. 47 shows an example of case 5 described above.

  Further, when the UE performs UCI transmission on the PUSCH, the UE may perform UCI mapping (with or without PUSCH puncturing or PUSCH rate matching for HARQ-ACK transmission) as follows. At this time, it is assumed that PUSCH rate matching is applied for CSI transmission.

  1> Case 6: PUSCH puncturing / rate matching (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule A for HARQ-ACK

  1. Here, the RE mapping rule A is a cluster-based B RE mapping rule.

  2. Also, the RE mapping can be a frequency-first mapping scheme, where (from the next symbol of the first DM-RS symbol in a slot or each frequency hop) the ascending symbol index (for the UCI mapped symbol). Will be

  ii. Apply (single) RE mapping rule B for CSI Part 1 and CSI Part 2

  1. Here, the RE mapping rule B may be a cluster-based RE mapping rule. Here, the (relative) UCI mapping order between REs in the cluster is the reverse order of RE mapping rule A. As an example, if the (relative) UCI mapping order between REs in a cluster in RE mapping rule A is an ascending (or descending) order of a frequency resource (eg, subcarrier) index, a RE mapping rule B The (relative) UCI mapping order between REs may be in descending (or descending) order of the frequency resource index.

  2. Also, the RE mapping may be a frequency-first mapping scheme, and may be performed in descending order of symbol index (for the UCI mapping target symbol) (from the last symbol in a slot or a frequency hop). (Or, in the RE mapping rule A, the order is the reverse of the UCI mapping order on the time axis applied to the UCI mapping target symbol.)

  B. Starting position of RE mapping (for each UCI type)

  i. For the HARQ-ACK, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule A based on the (single) RE mapping rule A.

  ii. With respect to the CSI part 2, the RE having the first UCI mapping order is mapped to the (single) RE mapping rule B with respect to the (single) RE mapping rule B.

  ii. According to the (single) RE mapping rule B from the RE with the next (UCI mapping) order of the last RE assigned for CSI part 2 relative to the (single) RE mapping rule B for CSI part 1 Perform RE mapping.

  Here, the HARQ-ACK can be transmitted by puncturing a UL-SCH region and / or a CSI transmission region (eg, CSI part 2) in the PUSCH.

  Further, (OFDM) symbols for transmitting the DM-RS can be excluded from symbols to be subjected to UCI mapping.

  FIG. 48 is a diagram schematically illustrating another example in which PUSCH puncturing or rate matching is applied for HARQ-ACK.

  FIG. 48 shows an example relating to case 6 described above.

  Further, when the UE performs UCI transmission on the PUSCH, the UE may perform UCI mapping (with or without PUSCH puncturing or PUSCH rate matching for HARQ-ACK transmission) as follows. At this time, it is assumed that PUSCH rate matching is applied for CSI transmission.

  {1} Case 7: PUSCH puncturing / rate matching (for HARQ-ACK)

  A. Applicability of (single) RE mapping rule

  i. Apply (single) RE mapping rule A for HARQ-ACK

  1. Here, the RE mapping rule A may be a cluster-based RE mapping rule.

  2. The RE mapping is a frequency-priority mapping scheme, and is performed in ascending order of symbol indexes (from the symbol next to the first DM-RS symbol in a slot or each frequency hop) (for UCI mapping target symbols).

  ii. Apply (single) RE mapping rule B for CSI Part 1 and CSI Part 2

  1. Here, RE mapping rule B is a cluster-based RE mapping rule. Here, the (relative) UCI mapping order between REs in a cluster may be the reverse order of RE mapping rule A. As an example, if the (relative) UCI mapping order between REs in a cluster in RE mapping rule A is an ascending (or descending) order of a frequency resource (eg, subcarrier) index, a RE mapping rule B The (relative) UCI mapping order between REs may be in descending (or descending) order of the frequency resource index.

  2. Also, RE mapping is a frequency-first mapping scheme, and can be performed in descending order of symbol index (for a UCI mapping target symbol) (from the last symbol in a slot or a frequency hop). (Or, it can be in reverse order to the time axis UCI mapping order applied to RE mapping rule A (for UCI mapping target symbols))

  B. Starting position of RE mapping (for each UCI type)

  i. For HARQ-ACK, RE mapping is performed from the RE having the first UCI mapping order to the (single) RE mapping rule A based on the (single) RE mapping rule A.

  ii. RE mapping based on the (single) RE mapping rule B is performed from the RE having the first UCI mapping order with respect to the (single) RE mapping rule B for the CSI part 1.

  iii. According to the (single) RE mapping rule B from the RE with the next (UCI mapping) order of the last RE assigned for CSI part 1 with respect to (single) RE mapping rule B for CSI part 2 Perform RE mapping.

  Here, the HARQ-ACK can be transmitted by puncturing a UL-SCH region and / or a CSI transmission region (eg, CSI part 2) in the PUSCH.

  In addition, (OFDM) symbols for transmitting DM-RSs can be excluded from symbols to be subjected to UCI mapping.

  FIG. 49 is a diagram schematically illustrating another example in which PUSCH puncturing or rate matching is applied for HARQ-ACK.

  FIG. 49 is an example of the case 7 described above.

  In case 6 or case 7 described above, the UE applies the same (cluster-based) RE mapping rule (by frequency-first mapping scheme) for HARQ-ACK and CSI (eg, CSI part 1 and CSI part 2), It is possible to apply RE mapping rules that are distinguished from each other only by 1) UCI mapping order between symbols and / or (2) RE mapping order within a cluster (relative) (eg, RE mapping rule A for HARQ-). ACK, RE mapping rule B for CSI, where RE mapping rules A / B are partitioned only in terms of (1) the UCI mapping order between symbols and / or (2) the (relative) RE mapping order within a cluster. ).

  Also, when frequency hopping is applied, the coded bits for all UCI-type UCIs are split into two parts. At this time, for each frequency hop, the RE mapping according to case 1 to case 6 described above may be applied to each UCI part (within a frequency hop) (ie, the same RE mapping rule is applied to each frequency hop). be able to).

  FIG. 50 is a diagram simply illustrating a UCI mapping method when the method in Case 6 is applied to each frequency hop in the present invention.

  Further, when the UE transmits UCI to the PUSCH, the base station can set the (maximum) coding rate (for each UCI type) to the UE by DCI and / or higher layer signals. At this time, if the coding rate calculated based on the number of REs (UCI mapping) calculated based on the beta offset and the UCI payload size exceeds the set (maximum) coding rate, the UE determines the corresponding UCI type. Can be omitted.

  Here, the maximum value of the number of REs for HARQ-ACK transmission is the total number of REs (subject to UCI mapping) in the PUSCH (or the specific number of REs proportional to the PUSCH duration). Also, the maximum value of the number of REs for transmission of CSI part 1 may be the number of REs obtained by subtracting the number of REs allocated for HARQ-ACK transmission from the total number of REs (subject to UCI mapping) in the PUSCH. Yes, the maximum number of REs for CSI part 2 transmission is allocated for HARQ-ACK transmission and CSI part 1 transmission in the total number of REs (subject to UCI mapping) in PUSCH. It can be the RE number obtained by subtracting all the RE numbers obtained.

  The above-mentioned twenty-fifth UCI transmission method can be combined and applied as long as it does not conflict with other proposals of the present invention.

  FIG. 51 is a flowchart simply showing a UCI transmission method applicable to the present invention.

  As shown in FIG. 51, the UE maps uplink control information (UCI) to a physical uplink shared channel (PUSCH) (S5110). This mapping operation is also called UCI piggyback.

  At this time, based on the size included in the uplink control information, the UE may perform rate matching or puncturing to map acknowledgment information on the PUSCH. In other words, the acknowledgment information included in the uplink control information is mapped to the PUSCH by applying rate matching or puncturing to the resource transmitting the acknowledgment information in the PUSCH based on the size of the acknowledgment information. Can be

  Preferably, when the size of the acknowledgment information exceeds a certain value, the UE may perform rate matching on a resource transmitting the acknowledgment information in the PUSCH to map the acknowledgment information to the PUSCH. On the other hand, when the size of the acknowledgment information is equal to or less than a certain value, the UE can perform puncturing on the resource for transmitting the acknowledgment information in the PUSCH in order to map the acknowledgment information to the PUSCH. Here, 2 bits can be applied as the constant value.

  At this time, the acknowledgment information is not mapped to a symbol preceding a symbol in the PUSCH where a first demodulation reference signal (DM-RS) is transmitted. Here, the first demodulation reference signal means a demodulation reference signal located in the first symbol in the PUSCH.

  Further, the uplink control information includes channel state information (CSI). In this case, the UE can perform rate matching on resources for transmitting CSI in the PUSCH in order to map the CSI to the PUSCH. In other words, the CSI can be mapped to the PUSCH by applying rate matching to a resource for transmitting the CSI in the PUSCH.

  At this time, the CSI is mapped only to resources other than resources of a certain size reserved for acknowledgment information in the PUSCH. Here, the fixed-size resource may be a resource corresponding to a 2-bit size.

  Next, the UE may determine the size of the acknowledgment information based on an uplink DAI (Downlink Assignment Index) value in an uplink grant received from the base station.

  Also, the UE can determine the size of the resource for transmitting acknowledgment information in the PUSCH based on a specific beta parameter. At this time, a specific beta parameter can be indicated by the following method.

  First, a plurality of sets are set by higher layer signaling. Next, the base station can indicate one set among a plurality of sets by an uplink grant. In this case, the UE transmits the acknowledgment information in the PUSCH based on one beta parameter determined based on the size of the acknowledgment information among the plurality of beta parameters included in one set indicated by the uplink grant. Determine the size of the resource to send.

  Further, the UE can map a part or all of the uplink control information to a demodulation reference signal (Demodulation Reference Signal) in the PUSCH. For this purpose, the UE can receive DM-RS symbols and / or interlace resource information within the symbols to which uplink control information can be mapped from the base station.

  Further, when the PUSCH is an SPS (Semi-Persistence Scheduling) PUSCH, the UE can perform rate matching or puncturing based on the maximum uplink control information payload dedicated to the SPS PUSCH. At this time, the UE can separately receive the maximum uplink control information payload information dedicated to the SPS PUSCH from the base station.

  When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH, the UE can perform rate matching or puncturing based on a beta offset value included in downlink control information for activating the SPS PUSCH.

  With such a configuration, after mapping the uplink control information to the PUSCH, the UE transmits the mapped uplink control information via the PUSCH (S5110).

  It is obvious that one example of the above-mentioned proposed scheme may be included as one of the realization methods of the present invention, and can be regarded as a kind of the proposed scheme. Further, the above-described proposed schemes may be realized independently, or may be realized in the form of a combination (or merge) of some of the proposed schemes. The information on whether or not the above proposed method is applied (or information on the rules of the above proposed method) is defined by a rule such that the base station informs the terminal by a predefined signal (eg, a physical layer signal or an upper layer signal). May be done.

4. Device configuration

  FIG. 52 is a diagram showing a configuration of a terminal and a base station capable of realizing the proposed embodiment. The terminal and the base station illustrated in FIG. 52 operate to realize the embodiment of the method of transmitting and receiving the uplink control information between the terminal and the base station described above.

  A terminal (UE: User Equipment) 1 can operate as a transmitting end in uplink and can operate as a receiving end in downlink. Further, the base station (eNB: e-Node B) 100 can operate as a receiving end in uplink and can operate as a transmitting end in downlink.

  That is, the terminal and the base station may include transmitters 10 and 110 and receivers 20 and 120, respectively, to control transmission and reception of information, data, and / or messages. , For transmitting and receiving data and / or messages.

  In addition, the terminal and the base station may include processors 40 and 140 for performing the above-described embodiments of the present invention, and memories 50 and 150 capable of temporarily or continuously storing the processing of the processors. Can be.

  The terminal 1 configured as described above maps the uplink control information to a physical uplink shared channel (PUSCH) via the processor 40. At this time, the acknowledgment information included in the uplink control information is based on the size of the acknowledgment information, the rate matching (rate-matching) or puncturing for the resource for transmitting the acknowledgment information in the PUSCH. It can be applied and mapped to PUSCH.

  Next, the terminal 1 transmits the mapped uplink control information via the PUSCH via the transmitter 10.

  A transmitter and a receiver included in a terminal and a base station perform a packet modulation / demodulation function for data transmission, a high-speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex. (TDD: Time Division Duplex) may have a packet scheduling and / or channel multiplexing function. Also, the terminal and the base station of FIG. 52 may further include a low power RF (Radio Frequency) / IF (Intermediate Frequency) unit.

  On the other hand, in the present invention, the personal digital assistant (PDA: Personal Digital Assistant), the cellular phone, the personal communication service (PCS: Personal Communication Service) phone, the GSM (Global System for Mobile) phone, and the WCDMA WDMDMA (decoder) , An MBS (Mobile Broadband System) phone, a handheld PC (Hand-Held PC), a notebook PC, a Smart phone, or a multi-mode multi-band (MM-MB) terminal. it can.

  Here, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal mobile terminal. The mobile communication terminal has functions such as schedule management, facsimile transmission and reception, and Internet connection that are functions of the personal mobile terminal. Terminal that integrates the data communication functions of the above. In addition, the multi-mode multi-band terminal includes a mobile Internet system and another mobile communication system (for example, a CDMA (Code Division Multiple Access) 2000 system, a WCDMA (Wideband CDMA) system, etc.) incorporating a multi-modem chip. Also refers to a terminal that can operate.

  Embodiments of the present invention can be realized by various means. For example, the embodiments of the present invention can be realized by hardware, firmware, software, or a combination thereof.

  In the case of a hardware implementation, the method according to embodiments of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processors (DSPDs), digital signal processors (DSPDs), and digital signal processors (DSPDs). ), An FPGA (field programmable gate array), a processor, a controller, a microcontroller, a microprocessor, or the like.

  For a firmware or software implementation, the method according to embodiments of the present invention may be implemented in the form of a module, procedure, or function that performs the functions or operations described above. For example, software code can be stored in memories 50 and 150 and driven by processors 14 and 140. The memory unit is provided inside or outside the processor, and can exchange data with the processor by various known means.

  The present invention may be embodied in other specific forms without departing from the technical idea and essential characteristics of the present invention. Therefore, the above detailed description should not be construed as limiting in any regard, but should be considered exemplary. The scope of the present invention must be determined by a rational interpretation of the appended claims, and any modifications within the equivalent scope of the present invention are included in the scope of the present invention. Further, the embodiments may be configured by combining the claims which are not explicitly referred to in the claims, or may be included as new claims by amendment after filing the application.

  Embodiments of the present invention can be applied to various wireless connection systems. Examples of various wireless connection systems include a 3GPP (3rd Generation Partnership Project) or 3GPP2 system. Embodiments of the present invention can be applied not only to the above various wireless connection systems but also to all technical fields to which the above various wireless connection systems are applied. Furthermore, the proposed method can also be applied to an mmWave communication system using an ultra-high frequency band.

Claims (20)

In a method in which a terminal transmits uplink control information to a base station in a wireless communication system,
The uplink control information is mapped to a physical uplink shared channel (PUSCH),
The acknowledgment information included in the uplink control information includes a rate-matching or puncturing for a resource for transmitting the acknowledgment information in the PUSCH based on a size of the acknowledgment information. ) Is applied and mapped to the PUSCH,
A method of transmitting uplink control information of a terminal, comprising transmitting the mapped uplink control information via the PUSCH. If the size of the acknowledgment information exceeds a certain value, the acknowledgment information is mapped to the PUSCH by applying rate matching to a resource for transmitting the acknowledgment information in the PUSCH,
If the size of the acknowledgment information is equal to or less than a certain value, the acknowledgment information is mapped to the PUSCH by applying puncturing to a resource for transmitting the acknowledgment information in the PUSCH. 2. The method for transmitting uplink control information of a terminal according to 1.   The uplink control information of the terminal according to claim 1, wherein the acknowledgment information is not mapped to a symbol that precedes a symbol in the PUSCH in which a first demodulation reference signal (DM-RS) is transmitted. Transmission method. When channel state information (CSI) is included in the uplink control information,
The method of claim 1, wherein the CSI is mapped to the PUSCH by applying rate matching to a resource for transmitting the CSI in the PUSCH.   The method of claim 4, wherein the CSI is mapped only to resources other than resources of a certain size reserved for the acknowledgment information in the PUSCH.   The transmission of the terminal's uplink control information according to claim 1, wherein the size of the acknowledgment information is determined based on an uplink DAI (Downlink Assignment Index) value in an uplink grant received from the base station. Method. The size of the resource for transmitting the acknowledgment information in the PUSCH is determined based on a first beta parameter,
When one set among a plurality of sets set by higher layer signaling is indicated by an uplink grant, the first beta parameter is the acknowledgment among a plurality of beta parameters included in the one set. The method of transmitting uplink control information of a terminal according to claim 1, wherein the one of the beta parameters is determined based on a size of the information.   The terminal according to claim 1, wherein a part or all of the uplink control information is mapped to a resource in a symbol in which a demodulation reference signal (Demodulation Reference Signal) in the PUSCH is transmitted. Transmission method. When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH,
The method for transmitting uplink control information of a terminal according to claim 1, wherein the rate matching or puncturing is performed based on a payload of maximum uplink control information dedicated to the SPS PUSCH. When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH,
The method of claim 1, wherein the rate matching or puncturing is performed based on a beta offset value included in downlink control information for activating the SPS PUSCH. In a terminal that transmits uplink control information to a base station in a wireless communication system,
A transmission unit;
A processor operatively connected to the transmitting unit,
The processor comprises:
The uplink control information is mapped to a physical uplink shared channel (PUSCH),
The acknowledgment information included in the uplink control information may be a rate-matching or puncturing resource for transmitting the acknowledgment information in the PUSCH based on a size of the acknowledgment information. ) Is applied and mapped to the PUSCH,
A terminal configured to transmit the mapped uplink control information via the PUSCH. If the size of the acknowledgment information exceeds a certain value, the acknowledgment information is mapped to the PUSCH by applying rate matching to a resource for transmitting the acknowledgment information in the PUSCH,
If the size of the acknowledgment information is equal to or less than a certain value, the acknowledgment information is mapped to the PUSCH by applying puncturing to a resource for transmitting the acknowledgment information in the PUSCH. 12. The terminal according to 11.   The terminal according to claim 11, wherein the acknowledgment information is not mapped to a symbol preceding a symbol in the PUSCH in which a first demodulation reference signal (DM-RS) is transmitted. When channel state information (CSI) is included in the uplink control information,
The terminal according to claim 11, wherein the CSI is mapped to the PUSCH by applying rate matching to a resource for transmitting the CSI in the PUSCH.   The terminal according to claim 14, wherein the CSI is mapped only to a resource other than a fixed-size resource reserved for the acknowledgment information in the PUSCH.   The terminal according to claim 11, wherein the size of the acknowledgment information is determined based on an uplink DAI (Downlink Assignment Index) value in an uplink grant received from the base station. The size of the resource for transmitting the acknowledgment information in the PUSCH is determined based on a first beta parameter,
When one set among a plurality of sets set by higher layer signaling is indicated by an uplink grant, the first beta parameter is the acknowledgment among a plurality of beta parameters included in the one set. The terminal according to claim 11, wherein the terminal is one beta parameter determined based on a size of the information.   The terminal according to claim 11, wherein a part or the whole of the uplink control information is mapped to a resource in a symbol in which a demodulation reference signal (Demodulation Reference Signal) in the PUSCH is transmitted. When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH,
The terminal according to claim 11, wherein the rate matching or puncturing is performed based on a payload of maximum uplink control information dedicated to the SPS PUSCH. When the PUSCH is an SPS (Semi-Persistence scheduling) PUSCH,
The terminal according to claim 11, wherein the rate matching or puncturing is performed based on a beta offset value included in downlink control information for activating the SPS PUSCH.